Gene switches such as Ubx make the initial decisions of which genes to turn on or off in different body regions and cell types. Later in an animal's development, epigenetic switches take over.

Shares of Unity Biotechnology Inc. (NASDAQ:UBX) sank 28.8% to close at $1.30 March 24 as a top-line readout of its phase IIb Aspire study testing UBX-1325 head-to-head against aflibercept in diabetic ...