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LAP是一类能水解肽链N-末端为亮氨酸的酶，广泛存在于肝、肾、胰等组织中，尤其以肝脏中含量最为丰富。各类肝病患者因肝细胞损伤，血清LAP的活性均有不同程度的升高，因此，血清LAP活性的检测能从不同侧面反映各种肝病的发生和发展。 测定原理：LAP分解L-亮氨酰对硝基苯胺生成对硝基苯胺，后者在405nm有最大吸收峰，通过测定吸光值升高速率来计算LAP活性。
LAP is a class of enzymes that hydrolyze peptides with leucine at the N‑terminus. It is widely distributed in tissues such as the liver, kidney, and pancreas, with the highest content found in the liver. In patients with various liver diseases, serum LAP activity is elevated to varying degrees due to hepatocyte damage. Therefore, the detection of serum LAP activity can reflect the occurrence and progression of various liver diseases from different aspects. Determination principle: LAP hydrolyzes L‑leucyl‑p‑nitroanilide to produce p‑nitroaniline, which has a maximum absorption peak at 405 nm. LAP activity is calculated by measuring the rate of increase in absorbance.
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