Abstract
RNA synthesis was studied mainly in the proximal sections of Rhynchosciara salivary glands in late fourth instar at two typical periods of development. These are characterized either by the absence or presence of the so-called “DNA puffs” in the salivary gland chromosomes. It was found that simultaneously with the appearance of the DNA puffs there is a great increase in the synthesis of all RNA species. The greatest increase was found to take place in the rate of synthesis of messenger-like RNA. Four main classes of messenger-like RNA were detected, having mobilities corresponding to 33, 23, 16, and 14 S RNA. There is a correlation between the abundance of the 16 S messenger-like RNA and the degree of opening of the B-2 DNA puff. This species might therefore be transcribed from this puff.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call