Heterogeneity of caprine k-casein macropetide

摘要

The heterogeneity of caprine caseinmacropeptide(CMP)was determined by means of treatments with neuraminidase and acid phosphatatase and analyess by anion exchange FPLC and reversed-phase (RP)-HPLC, with on-line and off-line electrospray ionization mass spectrometry. The main CMP components were two non-glycosylated and di-phosphorylated forms, as well as two other mono- phosphorylated species, each corresponding to a genetic variant of caprine k-casein due to the silent substitution Ile/Val at position 119.