Tanase S, Kojima H, Morino Y
Biochemistry. 1979 Jul 10;18(14):3002-7. doi: 10.1021/bi00581a015.
After borohydride reduction, carboxymethylation, and tryptic digestion of the holoenzyme of pig heart alanine aminotransferase, a single icosapeptide containing the N6-(phosphopyridoxyl)lysine residue was isolated by a combination of gel filtration and ion-exchange chromatogrpahy. Its primary structure was determined as Gln-Glu-Leu-Ala-Ser-Phe-His-Ser-Val-Ser-Lsy(Pxy)-Gly-Phe-Met-Gly-Glu-Cys-Gly-Phe-Arg.
对猪心丙氨酸转氨酶全酶进行硼氢化物还原、羧甲基化和胰蛋白酶消化后,通过凝胶过滤和离子交换色谱法相结合,分离出一种含有N6-(磷酸吡哆醛)赖氨酸残基的单一二十肽。其一级结构确定为Gln-Glu-Leu-Ala-Ser-Phe-His-Ser-Val-Ser-Lsy(Pxy)-Gly-Phe-Met-Gly-Glu-Cys-Gly-Phe-Arg。