mild micrococcal nuclease digestion of liver nuclei to separate `` '' expressed '' '' from `` '' unexpressed '' '' gene fractions ( tata , j. r. , and baker , b. s. ( 1978 ) j. mol . biol . 118 , 249-272 ) revealed that the multiple vitellogenin genes are found in two chromosomal states , here termed as `` '' expressible '' '' and `` '' nonexpressible . '' ''
C0007610
nuclei
C1516545
two chromos