Nonhiston protein HMG17 is purified from pig thymus. Elution of the pig thymus nuclei with 0.4mol/L NaCl leads to slightly lowering in DNase I sensitity of actively transcribedgene.

• 用核内蛋白质与经0.；4mol/L NaCL抽提后的细胞核重组；以DNA酶I消化法为测定活性基因的指标；观察猪胸腺HMG_(17)非组蛋白对细胞核中活性基因的影响。