Abstract
1. 1. Peptides derived from very lysine-rich histone by digestion with chymotrypsin interacted with DNA. 2. 2. The solubility of complexes formed between histones or other polybases and nucleic acid depends largely on the degree of cross-linking within these complexes. At low concentration of salt or polybase, soluble complexes were formed. Higher concentrations of salt or polybase caused the formation of insoluble cross-linked complexes. At still higher concentrations of salt or polybase, relatively soluble linear complexes between nucleic acid and polybase were formed, although these sometimes gave rise to turbidity. 3. 3. Evidence is presented to suggest that the very lysine-rich histones more easily form cross-links between nucleic acid molecules than do the arginine-rich histones. This may reflect the way these histones interact with DNA in chromatin.
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