Abstract
Summary
Exposure of salivary-gland chromosomes in vivo to ecdysterone (iso-inokosterone), inokosterone, ponasterone A, and proteinic brain hormone results in increased mean ratio of diameter of five index puffs in relation to adjacent bands. The rate and pattern of response differ characteristically for each hormone and each puff studied. In lower concentration the response to proteinic brain hormone is slower than that to ecdysterone.
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