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 language people once spoke Asa, but shifted to Nandi (as opposed to Maasai). Asa language The Asa (Aasá) language, commonly rendered Aasax, was spoken by the Asa people of Tanzania. The language is extinct; ethnic Assa in northern Tanzania remember only a few words they overheard their elders use, and none ever used it themselves. Little is known of the language; what is recorded was probably Aasa lexical words used in a register of Maasai like the mixed language Mbugu. Asa is usually classified as Cushitic, most closely related to Kw'adza. However, it might have retained a non-Cushitic layer from an