Sequential gene activation by ecdysone in polytene chromosomes of Drosophila melanogaster,: IV. The mid prepupal period |
| |
Authors: | Geoffrey Richards |
| |
Institution: | Department of Genetics, University of Cambridge, Downing Street, Cambridge, England |
| |
Abstract: | In the mid prepupal period of development of Drosophila melanogaster two major changes in gene activity occur in the salivary glands: (a) The mid prepupal puffs (e.g., 63E, 75CD) are induced and (b) the late prepupal puffs (e.g., 62E, 74EF, 75B, and 93F) acquire the competence to respond to ecdysone. These events can be studied in vitro. Both require that the ecdysone titre be very low (<5 × 10?9, M) and both events depend upon protein synthesis. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|