A structural gene is a gene whose product is an enzyme, or a protein that is involved in structural functions (i.e., tRNA, rRNA, etc.). It is a concept relative to regulatory genes. A regulatory genes' function is to regulate the expression of other...

In biochemistry, the primary structure of a biological molecule is the exact specification of its atomic composition and the chemical bonds connecting those atoms (including stereochemistry). For a typical unbranched, un-crosslinked biopolymer (such as...

If you think gasoline prices are high now, consider the eye-popping possibilities if another monster storm pummels the Gulf of Mexico this hurricane season, the way Katrina and Rita battered the petroleum-rich waters in 2005.The petroleum industry has spent nearly two years trying to repair...