Wheat Embryo Ribonucleates. II. 3′-Hydroxyl Termini of the Satellite, 18 S, and 26 S Ribosomal Ribonucleates

Abstract

(1) Terminal labelling with (3H)-borohydride has been used as a means of examining the 3′-hydroxyl termini in wheat embryo RNA.(2) The principal 3′-hydroxyl termini in the "satellite," 18 S, and 26 S components of wheat-embryo ribosomal RNA have been found to be cytidine, guanosine, and uridine, respectively.(3) The occurrence of 3′-hydroxyl terminal cytidine, in satellite RNA, and 3′-hydroxyl terminal guanosine, in 18 S RNA, has never been observed for the corresponding ribosomal ribonucleates from any other source material. The possible significance of this "irregularity" is a subject of discussion.