previous studies have shown that ( i ) several rnas induced by heat shock of drosophila melanogaster cells are homologous to tandemly repeated alpha beta units found in cloned segments of d. melanogaster dna , and ( ii ) the alpha beta sequences are present both at a major heat shock locus , 87cl , and the chromocenter of polytene chromosomes ( lis , j.t. , prestidge , l. and hogness , d.s . [ 1978 ] cell 14 , 901-919 ) .
C1708726
locus
C0007634
cell