How do bacteria avoid wasteful production of unnecessary proteins when their genes are always on? The answer lies in regulating the operon. As trp levels increase, trp binds to trpR, causing a ...

This is a preview. Log in through your library . Abstract We have cloned a DNA fragment harboring the genes for ribosomal proteins L2, L4, and L23 on a plasmid vector that contains a lac operator and ...

Proceedings of the National Academy of Sciences of the United States of America, Vol. 77, No. 4, [Part 2: Biological Sciences] (Apr., 1980), pp. 1768-1772 (5 pages) The ability of indole derivatives ...

Carbon catabolite repression (CCR) is a global regulatory mechanism that inhibits the expression and activities of functions for the use of secondary carbon sources when a preferred carbon source is ...

The 92-year-old bacterial geneticist who helped pioneer the study of gene regulation has passed away. A series of rodent experiments showed that even with abundant food and water, personal space is ...