Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science . Aspaktic Acid. Glutamic Acid, C-;H0XO4.—This acid is a-amino-normal-glutaric acid and as such bears the following graphic formula: XH. ICH-COOH ICHo DECOMPOSITION PRODUCTS OF 71 Upon hydrolyzing the wheat proteid gliadin with hydrochloricacid, Osborne and Harris obtained a yield of 37 per centof glutamic acid. This is the largesl amount of an amino Fig. Glutamic Acid. Reproduced from a micro-photograph made by Prof. E. T
Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science . Aspaktic Acid. Glutamic Acid, C-;H0XO4.—This acid is a-amino-normal-glutaric acid and as such bears the following graphic formula: XH. ICH-COOH ICHo DECOMPOSITION PRODUCTS OF 71 Upon hydrolyzing the wheat proteid gliadin with hydrochloricacid, Osborne and Harris obtained a yield of 37 per centof glutamic acid. This is the largesl amount of an amino Fig. Glutamic Acid. Reproduced from a micro-photograph made by Prof. E. T. Reichert, of the University of Pennsylvania. acid yet obtained as a decomposition product of any proteidsubstance. Crystals of glutamic acid, obtained from the pro-teid gliadin, are reproduced in Fig. 26. Glycocoll, C2H5N02.—Glycocoll, or amino acetic acid, isthe simplest of the amino acids and has the followingformula: NH2 H-C-COOH. H It was the second of the decomposition products of proteids tobe discovered, being preceded only by leucin. In distinctionfrom the greater number of the amino acids, glycocoll may bedetermined quantitatively very accurately. Hippuric acid maybe formed synthetically through a union of glycocoll and ben- 72 PHYSIOLOGICAL CHEMISTRY, zoic acid (see page 263). This method is not used very exten-sively at present, however, having been replaced by Fischersmethod. Glycocoll, ingested in small amount, is excreted inthe urine as urea, whereas if administered in excess it appearsin part unchan
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