Fig. 19. Heat-stable RABs extracted from crowns of winter wheat plants of different ages. Plants were sown on 15 and 25 August and September 5 and sampled on 30 October (A), 16 April (B), and 4 May (C). Electrophoresis and Western blotting were as described in the legend to Fig. 18. The molecular weights of the proteins are indicated above the density tracings.