[Proteins of polyribosome-bound informosome of germinating wheat embryos]

Proteins of polyribosome-bound informosomes of germinating wheat embryos were studied by electrophoresis in polyacrylamide gel in presence of sodium dodecyl sulfate. liberation of informosomal proteins was achieved by mild ribonuclease treatment of polyribosomes. It was shown, that proteins of informosomes associated with polyribosomes contain polypeptides with molecular weights of 86 000, 75 000, 72 000, 66 000, 52 000 and 34 000. The milecular weights of two most prominent proteins were 86 000 and 52 000. The treatment of polyribosomes with 0.5 M KCl resulted in the loss of large part of informosomal proteins, which are revealed in the KCl-wash.