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  3. Lysine 4-nitroanilide

Lysine 4-nitroanilide是一种氨基酸衍生物,用于研究酶学。从 rat heart 的无颗粒 supernatant 中通过 DEAE-Sephadex 色谱分离出两种主要的 arylamidase 活性。虽然这两种酶都能水解 L-leucine 4-nitroanilide,但只有峰 II 酶能水解 L-lysine 4-nitroanilide。第三种少量峰 (Ia) 包含主要对 L-lysine 4-nitroanilide 有活性的酶。峰 I 和 II 中的酶分子量分别约为 257000 和 105000。峰 I 酶的最适 pH 约为 pH7.0,而峰 II 酶的最适 pH 在 7.0-8.0 之间。两种酶都能被puromycin、p-羟基汞苯甲酸盐、邻苯二酚和二价金属离子抑制。添加 dithiothreitol 可刺激两种活性。与邻苯二酚透析会导致峰 I 和 II 酶的抑制,但与 EDTA 透析仅抑制峰 II 酶。

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Lysine 4-nitroanilide Chemical Structure

Lysine 4-nitroanilide Chemical Structure

CAS No. : 6184-11-8

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生物活性

Lysine 4-nitroanilide is an amino acid derivative used in studies of enzymology. Two major arylamidase activities were isolated from particle-free supernatant of rat heart by DEAE-Sephadex chromatography. Although both enzymes hydrolyze L-leucine 4-nitroanilide, only the peak II enzyme does so. A third, minor peak (Ia) contains the enzyme active primarily toward L-lysine 4-nitroanilide. The molecular weights of the enzymes in peaks I and II are approximately 257,000 and 105,000, respectively. The optimum pH for the peak I enzyme is approximately pH 7.0, while that for the peak II enzyme is between 7.0 and 8.0. Both enzymes are inhibited by puromycin, p-hydroxymercurybenzoate, catechol, and divalent metal ions. Addition of dithiothreitol stimulates both activities. Dialysis against catechol resulted in inhibition of both peak I and II enzymes, but dialysis against EDTA inhibited only the peak II enzyme.

分子量

266.30

Formula

C12H18N4O3

CAS 号
运输条件

Room temperature in continental US; may vary elsewhere.

储存方式

Please store the product under the recommended conditions in the Certificate of Analysis.

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参考文献

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