Pyridoxal-5-phosphate, a derivative of vitamin B6, forms one of these structures in aspartate aminotransferase when its aldehyde group binds to a lysine residue.
One of these is central to the decarboxylation of beta-keto acids by acetoacetate decarboxylase, as its formation allows the decarboxylation to proceed without a charged intermediate. Another instance of this group is central to the mechanism of aldolase in glycolysis. One of these forms the linkage between 11-cis-retinal and opsin to form rhodopsin, and breaks when light isomerizes that molecule. Pyridoxal-5-phosphate, a derivative of vitamin B6, forms one of these structures in aspartate aminotransferase when its aldehyde group binds to a lysine residue. For 10 points, name this common functional group in biochemistry which contains a nitrogen single bonded to one carbon and double bonded to another, which can accept a proton.
One of these is central to the decarboxylation of beta-keto acids by acetoacetate decarboxylase, as its formation allows the decarboxylation to proceed without a charged intermediate.
{Schiff Base} [or {imine}]