2S ARGININE-RICH PROTEINS FROM PINUS-PINASTER SEEDS

Low molecular weight globulins, which are abundant proteins in the Pin us pinaster Ait. megagametophyte, were purified and characterized. The y showed a dimeric structure formed of one large and one small subunit linked by disulfide bridges. They were characterized by a high Arg an d Glx content and by a relatively high Cys content. A comparison of th eir characteristics with those of angiosperm 2S proteins suggests that there is homology between them.