EN
It was tried to introduce to a diluent used to freeze bovine men a lipoprotein fraction (LDL) of a low density of egg yolk. The obtained by ultracentrifugation electrophoreallv homogenous fraction of LDL (10%) pasteurized and Ided into a diluent has similar as an yolk egg values otecting plasmolemma of the freezed and thawed spermazoons. A significant differences between the variants of luents containing a full egg yolk and LDL were not und both in a percentage of mobility of spermatozoons, orfological changes in the acrosom and leak of the AspAT iring a process of freezing and after semen freezing, le obtained results point to a possibility to produce diluent for bovine semen of a prolonged stability.