after fractionation of nuclear proteins by extraction with solutions of different ionic strength , these polypeptides are present in the fraction of nuclear sap proteins soluble in 0.1 m tris - hcl buffer , ph 7.6 , and in the fraction of non-histone chromosomal proteins which are soluble in 0.35 m nacl .
C0028589
nuclear proteins
C0008600
non-histone chromosomal proteins