The Polypeptide Patterns of Membrane Fractions from Normal and Primary Thylakoids of Bean Leaves

The polypeptide pattern of primary thylakoids from bean plastids grown under a flash regime, and of their heavy and light fractions was compared with that of normal green thylakoids. The primary thylakoids are deficient in some polypeptides (especially the 23 kdalton polypeptide 9) which are characteristic of the heavy fraction of normal green thylakoids. A heavy and a light fractions were separated in most preparations from the primary thylakoids of flashed bean leaves, although these leaves did not emit oxygen when illuminated with continuous intense light for the first time.