the chromatin template activity of the polytene x chromosomal dna was assayed by in situ transcription on the fixed polytene chromosomes using e. coli rna polymerase holoenzyme and 3h-utp as the monitoring substrate in various 1x2a , 2x2a and 3x2a larvae and 1x2a ( + x fragments ) segmental aneuploid larvae of drosophila melanogaster .
C0040649
transcription
C0035681
rna