Ribonucleotide reductases carry out the biosynthesis of ribonucleotides by catalytically using radicals of these  compounds.
Aryl versions of these compounds are produced after the alkaline hydrolysis of aryl xanthates in a reaction named for  Leuckart. Ribonucleotide reductases carry out the biosynthesis of ribonucleotides by catalytically using radicals of these  compounds. The coenzyme responsible for methane biosynthesis contains one of these compounds at the reactive site.  Another biological example of these compounds is (*) Coenzyme A, in which pantothenate is bonded to cysteamine. One of  these compounds is typically added to natural gas to make its presence detectable, and these compounds got one of their names  because they can bond strongly with mercury. For 10 points, name this functional group characterized by a sulfur atom bonded to  a hydrogen atom, which are the sulfuric analogs of alcohols.
Aryl versions of these compounds are produced after the alkaline hydrolysis of aryl xanthates in a reaction named for  Leuckart.
thiols [or mercaptans]