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sulfonium 〔美國〕= sulphonium.

sulfonmethane

Sam has three ionizable groups besides the sulfonium pole : the carboxyl and the aminic groups of the amino acidic chain with pk 1 . 8 and 7 . 8 respectively and the aminic group of the purine with pk 3 . 4 . in an acid environment sam is positive charged , so it could be adsorbed by weak - acid cation exchange resin Sam除具有一個帶正電荷的锍外,還有三個可離子化的基團: pk _ a分別為1 . 8 、 7 . 8的氨基酸鏈上的羧基和氨基, pk _ a為3 . 4的嘌呤環上的氨基。

Methylmethionine sulfonium chloride 氯化甲硫氨基酸