Phosphorylated intermediates of two hepatic microsomal ATPases.

Abstract

The hepatic microsomal Ca2+- and Mg2+-dependent ATPase phosphoenzyme intermediates were distinguished by using the chelators EGTA and CDTA (trans-cyclohexane-1,2-diamine-NNN'N'-tetra-acetic acid). The Ca2+-ATPase intermediate is a hydroxylamine-labile base-labile 125 000-Mr phosphoprotein. The Mg2+-ATPase intermediate is a hydroxylamine-stable base-stable… (More)

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