Quick view C-telopeptide of Collagen alpha-1 (I) chain | AP80077 C-telopeptide of Collagen alpha-1 (I) chain | AP80077 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Cytosolic 5'-nucleotidase III-like protein | AP80070 Cytosolic 5'-nucleotidase III-like protein | AP80070 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 4F2 cell-surface antigen heavy chain | AP80069 4F2 cell-surface antigen heavy chain | AP80069 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Retinal-specific ATP-binding cassette transporter | AP80067 Retinal-specific ATP-binding cassette transporter | AP80067 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 14-3-3 protein zeta/delta | AP80062 14-3-3 protein zeta/delta | AP80062 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Ischemia Modified Albumin | AP80059 Ischemia Modified Albumin | AP80059 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view N-terminal propeptide of Collagen alpha-1 (I) chain | AP80058 N-terminal propeptide of Collagen alpha-1 (I) chain | AP80058 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 1 | AP80057 3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 1 | AP80057 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 14-3-3 protein sigma | AP80056 14-3-3 protein sigma | AP80056 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Fc region of Immunoglobulin G | AP80054 Fc region of Immunoglobulin G | AP80054 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 14-3-3 protein zeta/delta | AP80052 14-3-3 protein zeta/delta | AP80052 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Advanced glycation end-product | AP80048 Advanced glycation end-product | AP80048 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view C-terminal telopeptide of Collagen alpha-1 (III) chain | AP80043 C-terminal telopeptide of Collagen alpha-1 (III) chain | AP80043 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Cytosolic 5'-nucleotidase III-like protein | AP80042 Cytosolic 5'-nucleotidase III-like protein | AP80042 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Advanced glycation end-product | AP80037 Advanced glycation end-product | AP80037 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 14-3-3 protein theta | AP80031 14-3-3 protein theta | AP80031 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Oxidized low-density lipoprotein | AP80030 Oxidized low-density lipoprotein | AP80030 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Angiotensin-converting enzyme 2 | AP80028 Angiotensin-converting enzyme 2 | AP80028 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Angiotensin-converting enzyme 2 | AP80027 Angiotensin-converting enzyme 2 | AP80027 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Medium-chain specific acyl-CoA dehydrogenase, mitochondrial | AP80026 Medium-chain specific acyl-CoA dehydrogenase, mitochondrial | AP80026 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view ATP-binding cassette sub-family A member 7 | AP80025 ATP-binding cassette sub-family A member 7 | AP80025 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 5'-AMP-activated protein kinase subunit beta-1 | AP80019 5'-AMP-activated protein kinase subunit beta-1 | AP80019 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Alpha- and gamma-adaptin-binding protein p34 | AP80018 Alpha- and gamma-adaptin-binding protein p34 | AP80018 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 7-methylguanosine phosphate-specific 5'-nucleotidase | AP80013 7-methylguanosine phosphate-specific 5'-nucleotidase | AP80013 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view C-telopeptide of Collagen alpha-1 (II) chain | AP80011 C-telopeptide of Collagen alpha-1 (II) chain | AP80011 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Angiotensin-converting enzyme 2 | AP80009 Angiotensin-converting enzyme 2 | AP80009 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view ATP-binding cassette sub-family G member 2 | AP80008 ATP-binding cassette sub-family G member 2 | AP80008 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 14-3-3 protein theta | AP80005 14-3-3 protein theta | AP80005 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Oxidized low-density lipoprotein | AP80003 Oxidized low-density lipoprotein | AP80003 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 1 | AP80002 3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 1 | AP80002 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 14-3-3 protein sigma | AP79996 14-3-3 protein sigma | AP79996 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view C-terminal propeptide of Collagen alpha-1 (I) chain | AP79991 C-terminal propeptide of Collagen alpha-1 (I) chain | AP79991 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view C-terminal propeptide of Collagen alpha-1 (II) chain | AP79990 C-terminal propeptide of Collagen alpha-1 (II) chain | AP79990 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Erythroid protein 4.1 | AP79988 Erythroid protein 4.1 | AP79988 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view HLA class II histocompatibility antigen, DRB1-9 beta chain | AP79987 HLA class II histocompatibility antigen, DRB1-9 beta chain | AP79987 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 4F2 cell-surface antigen heavy chain | AP79983 4F2 cell-surface antigen heavy chain | AP79983 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 14-3-3 protein theta | AP79979 14-3-3 protein theta | AP79979 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Glucagon-like peptide 1 | AP79976 Glucagon-like peptide 1 | AP79976 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Glycosylated hemoglobin A1c | AP79975 Glycosylated hemoglobin A1c | AP79975 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view C-telopeptide of Collagen alpha-1 (II) chain | AP79969 C-telopeptide of Collagen alpha-1 (II) chain | AP79969 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view C-terminal propeptide of Collagen alpha-1 (I) chain | AP79967 C-terminal propeptide of Collagen alpha-1 (I) chain | AP79967 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 14-3-3 protein zeta/delta | AP79965 14-3-3 protein zeta/delta | AP79965 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view N-terminal propeptide of Collagen alpha-1 (II) chain | AP79962 N-terminal propeptide of Collagen alpha-1 (II) chain | AP79962 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Putative aspartate aminotransferase, cytoplasmic 2 | AP79958 Putative aspartate aminotransferase, cytoplasmic 2 | AP79958 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Neuroendocrine protein 7B2 | AP79955 Neuroendocrine protein 7B2 | AP79955 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 7-methylguanosine phosphate-specific 5'-nucleotidase | AP79954 7-methylguanosine phosphate-specific 5'-nucleotidase | AP79954 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Glycosylated hemoglobin A1c | AP79952 Glycosylated hemoglobin A1c | AP79952 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view 14-3-3 protein sigma | AP79950 14-3-3 protein sigma | AP79950 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view N-terminal propeptide of Collagen alpha-1 (I) chain | AP79945 N-terminal propeptide of Collagen alpha-1 (I) chain | AP79945 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Oxidized low-density lipoprotein | AP79940 Oxidized low-density lipoprotein | AP79940 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Keratin, type II cytoskeletal 6A | AP79939 Keratin, type II cytoskeletal 6A | AP79939 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Solute carrier family 2, facilitated glucose transporter member 4 | AP79936 Solute carrier family 2, facilitated glucose transporter member 4 | AP79936 | SABHost species: E.coliTag info: HisStorage Conditions:Store at -20°C. (Avoid repeated freezing and thawing.) MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details C-telopeptide of Collagen alpha-1 (I) chain | AP80077 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Cytosolic 5'-nucleotidase III-like protein | AP80070 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 4F2 cell-surface antigen heavy chain | AP80069 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Retinal-specific ATP-binding cassette transporter | AP80067 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 14-3-3 protein zeta/delta | AP80062 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Ischemia Modified Albumin | AP80059 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details N-terminal propeptide of Collagen alpha-1 (I) chain | AP80058 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 1 | AP80057 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 14-3-3 protein sigma | AP80056 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Fc region of Immunoglobulin G | AP80054 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 14-3-3 protein zeta/delta | AP80052 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Advanced glycation end-product | AP80048 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details C-terminal telopeptide of Collagen alpha-1 (III) chain | AP80043 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Cytosolic 5'-nucleotidase III-like protein | AP80042 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Advanced glycation end-product | AP80037 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 14-3-3 protein theta | AP80031 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Oxidized low-density lipoprotein | AP80030 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Angiotensin-converting enzyme 2 | AP80028 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Angiotensin-converting enzyme 2 | AP80027 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Medium-chain specific acyl-CoA dehydrogenase, mitochondrial | AP80026 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details ATP-binding cassette sub-family A member 7 | AP80025 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 5'-AMP-activated protein kinase subunit beta-1 | AP80019 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Alpha- and gamma-adaptin-binding protein p34 | AP80018 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 7-methylguanosine phosphate-specific 5'-nucleotidase | AP80013 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details C-telopeptide of Collagen alpha-1 (II) chain | AP80011 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Angiotensin-converting enzyme 2 | AP80009 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details ATP-binding cassette sub-family G member 2 | AP80008 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 14-3-3 protein theta | AP80005 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Oxidized low-density lipoprotein | AP80003 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 3 beta-hydroxysteroid dehydrogenase/Delta 5-->4-isomerase type 1 | AP80002 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 14-3-3 protein sigma | AP79996 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details C-terminal propeptide of Collagen alpha-1 (I) chain | AP79991 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details C-terminal propeptide of Collagen alpha-1 (II) chain | AP79990 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Erythroid protein 4.1 | AP79988 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details HLA class II histocompatibility antigen, DRB1-9 beta chain | AP79987 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 4F2 cell-surface antigen heavy chain | AP79983 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 14-3-3 protein theta | AP79979 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Glucagon-like peptide 1 | AP79976 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Glycosylated hemoglobin A1c | AP79975 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details C-telopeptide of Collagen alpha-1 (II) chain | AP79969 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details C-terminal propeptide of Collagen alpha-1 (I) chain | AP79967 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 14-3-3 protein zeta/delta | AP79965 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details N-terminal propeptide of Collagen alpha-1 (II) chain | AP79962 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Putative aspartate aminotransferase, cytoplasmic 2 | AP79958 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Neuroendocrine protein 7B2 | AP79955 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 7-methylguanosine phosphate-specific 5'-nucleotidase | AP79954 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Glycosylated hemoglobin A1c | AP79952 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details 14-3-3 protein sigma | AP79950 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details N-terminal propeptide of Collagen alpha-1 (I) chain | AP79945 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Oxidized low-density lipoprotein | AP79940 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Keratin, type II cytoskeletal 6A | AP79939 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare
Quick view Details Solute carrier family 2, facilitated glucose transporter member 4 | AP79936 MSRP: Was: Now: €2,280 - €8,055 Choose Options Compare