Abstract
Three wild species of lentil, Lens orientalis, L. ervoides and L. nigricans were investigated for protein subunits of the albumin protein fraction (APF), globulin protein fraction (GPF) and for protein and free amino acid composition. The APF and GPF formed 12.7–16.8 % and 34.7–49.0 %, respectively, of the meal nitrogen. SDS-PAGE showed APF to contain 15 to 20 major and a similar number of minor protein subunits ranging in M r at least from 14 400 to 94 000. The GPF was also heterogenous and contained some subunits having M r similar to APF subunits but none < 15 000. The three wild lentil species were distinguishable by their protein subunit composition. The protein amino acid composition of the wild species was identical and similar to that of the cultivated lentil. The wild species, like the cultivated species ( L. culinaris), contained major amounts of free arginine, glutamic and aspartic acids, serine and a number of unidentified amino acids. L. orientalis, L. nigricans and the cultivated lentil contained two acidic and two basic unidentified amino acids. However, L. ervoides was distinctly different in that it contained only the two acidic plus one neutral unidentified amino acid, but none of the two basic unidentified amino acids.
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