The presence of minor histone components in the chromatin of Pisum sativum L. seedlings.

Two minor basic protein components (M1 and M2) were found in the histone extract from chromatin of pea seedlings. In the histone extract of pea cotyledons only one minor component (M1) was detected. These minor components show a high affinity for chromatin, have a molecular weight of 20.200 and 17.800 respectively and a basic amino acid composition. They are not contaminants of cytoplasmatic origin. Two similar minor components were found in the chromatin of Pisum arvense and Lens culinaris-seedlings, one component was present in the chromatin from cotyledons of these species.