A poly(U)‐binding activity is present in the high‐speed supernatant fraction of embryo homogenates from wheat seeds. The factor responsible for such activity was found to have a stimulatory effect on the elongation factor 1 (EF‐1). It copurifies with EF‐1L, the lighter form of EF‐1, through Sephadex G‐200, DEAE‐cellulose, hydroxyapatite and poly(U)‐Sepharose 4B column chromatography. The two factors could be separated only through a heating step which destroyed EF‐1 activity whilst leaving most of the poly(U)‐binding activity unaltered.