“head-to-tail” conversion of SAIL-Glu, (2S,3S,4R)-[3,4-2H2;1,2,3,4,5-13C5;2-15N]glutamic acid, with high stereospecificities for all five chiral centers. With the SAIL-Lys in hand, the unambiguous simultaneous stereospecific assignments were able to be established for each of the prochiral protons within the four methylene groups of the Lys side chains in proteins.
立体同位素标记的(
SAIL)赖
氨酸(2 S,3 R,4 R,5 S,6 R)-[3,4,5,6- 2 H 4 ; 1,2,3,4,5,6 - 13 C ^ 6 ; 2,6- 15 ñ 2 ]赖
氨酸,用帆谷
氨酸的“头到尾”的转换,(2合成小号,3小号,4 - [R )- [3,4- 2 ħ 2 ; 1,2,3,4,5- 13 C 5 ; 2- 15N]谷
氨酸,对所有五个手性中心具有高立体特异性。有了
SAIL-Lys,就可以为蛋白质中Lys侧链的四个亚甲基内的每个前手性质子建立明确的同时立体定向。