Analysis of Phosphorylation of Wheat Elongation Factor 1β and β′ by Casein Kinase II

Abstract
The purified casein kinase II (CK II) from Arabidopsis thaliana phosphorylates wheat elongation factor (EF- ), but not elongation factor Iβ’ (EF-lβ’), which lacks a serine residue in the conserved phosphorylation site. Both EF- and1β’ subunits, with similar functions, seem to undergo different regulation despite the partial amino acid sequence of EF-lβ being similar to that of EF-1β’.

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