Biology · Developmental Gene Regulation
During development, yfg expression is regulated by proteins E, F and G, which are abundant and have long half-lives. After a 'specific stage of development', the protein E is activated by a single short wave of phosphorylation. This leads to the following events: • Phosphorylated E activates F. • Active F activates G. • Active G promotes yfg expression. • Active F completely inhibits E, and active G completely inhibits F function. Which one of the following describes the expression of yfg soon after the 'specific stage of development' is reached?
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