[Non-identical subunits of 7S globulin (gossipulin-1) from cotton seeds].

7S globulin is isolated from cotton seeds and is designated as "Gossipulin-1". Three different amino acids (glycine, aspartic acid and leucine) are found to follow the N-terminal amino acid which is indicative of a non-identity of its subunits. Gossipulin-1 dissociated in 0.1 M HCl, depending on the time of incubation, into 3.87, 2.39 and 1.35 subunits. It had a sedimentation constant of 0.37S in alkaline medium and of 1.24S on 8 M urea. A sedimentation peak of 1.1S was discovered in reduced and alkylated Gossipulin-1.