The DNA-binding unit in sea urchin spermatogenous histones. II. The position of the DNA-binding unit in the nucleosome structure.

Abstract

All the DNA-binding arms of sea urchin spermatogenous H1 and H2B have the repeat of the tetrapeptide, SPKK. The location of H1 and H2B in the nucleosome and their domain structures indicate that SPKK residues are bound to the linker DNA.