[The glycolipoproteins of plastid membrane system in process of chloroplast biogenesis]

The glycolipoprotein fractions were isolated from the prolamellar and lamellar system of plastids. The glycolipoproteins were studied on the formic acid--urea polyacrylamide gel. The glycolipoproteins from the chloroplast lamellar system of bean leaves have the molecular weight 38 000, 93 000 and above 160 000. The amino acid composition of glycolipoproteins and its biosynthesis were studied in vivo and in vitro experiments. The glycolipoproteins were the first membrane proteins which were formed by chloroplasts in vitro. It is concluded that 70S ribosomes are involved in the glycolipoproteins biosynthesis.