Acetyl group known as paracetamol), and acetylsalicylic acid (better known as aspirin). The introduction of an acetyl group into a molecule is called acetylation. In biological organisms, acetyl groups are commonly transferred from acetyl-CoA to other organic molecules. Acetyl-CoA is an intermediate both in the biological synthesis and in the breakdown of many organic molecules. Acetyl-CoA is also created during the second stage of cellular respiration, the Krebs Cycle, by the action of pyruvate dehydrogenase on pyruvic acid. Histones and other proteins are often modified by acetylation. For example, on the DNA level, histone acetylation by acetyltransferases (HATs) causes an expansion of
Asa Townsend east of Arkona, apparently next door to an Ezekiel Townsend who was possibly his son. The Townsends had been joined in 1833 by settler Henry Utter who settled what would become the south-eastern corner of Arkona. Asa Townsend Asa Townsend (c.1775-alive 1851) was an early settler in Westminster Township near what became the City of London, Ontario. His lands ultimately became incorporated in London's Springbank Park. By the 1820s he removed westward to settle on the bank of the Ausable River in what later became Bosanquet Township in Lambton County. Here he operated a salt well. He and his wife—whose