Monographs on Biochemistry Volume 10 (Paperback) - 5 Angebote vergleichen

Von Händler/Antiquariat, BuySomeBooks [52360437], Las Vegas, NV, U.S.A.
This item is printed on demand. Paperback. 54 pages. Dimensions: 9.7in. x 7.4in. x 0.1in.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: . . . secondly, substances of quinonoid structure which are believed to be necessary precursors of homogentisic acid (p. 69) are not necessarily formed in the catabolism of the aromatic amino and ketonic acids which undergo complete oxidation in the body, since none of the four previously mentioned substances are capable of forming para-quinonoid derivatives. 1 (c) It appears that only those aromatic amino and ketonic acids are capable of yielding acetoacetic acid when perfused through a surviving liver which possess the side-chain--It is essential that the hydrogen of the CH2 group adjacent to the nucleus be unsubstituted. Thus phenylserine, C6H6. CHOH. CHNH2. COOH, although structurally so similar to phenylalanine, is converted into hippuric acid in the animal body (Dakin). A consideration of its formula will show that it cannot yield acetoacetic acid in the same way as phenylalanine and tyrosine do, if the scheme suggested for the catabolism of the latter substance be correct. 2 (d) If the acetoacetic acid be formed from phenylalanine and tyrosine in the manner indicated, an adequate explanation is afforded of the striking differences in the behaviour of other aromatic substances. The reason of the failure of phenylaminoacetic acid, 7phenyl-a-aminobutyric acid and their derivatives to undergo complete oxidation in the body may reasonably be referred to the structural impossibility of their yielding acetoacetic acid along the lines believed to represent phenylalanine catabolism. Similarly, the phenyl-fatty acids, which when possible undergo S-oxidation, can neither yield acetoacetic acid nor undergo complete oxidation. Furthermore, the failure of tryptophane to yield acetoacetic acid, although it does apparently undergo complete oxidation in the animal body, may. . . This item ships from La Vergne,TN.

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Von Händler/Antiquariat, The Book Depository US [58762574], London, United Kingdom.
Language: English Brand New Book ***** Print on Demand *****. This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: .secondly, substances of quinonoid structure which are believed to be necessary precursors of homogentisic acid (p. 69) are not necessarily formed in the catabolism of the aromatic amino and ketonic acids which undergo complete oxidation in the body, since none of the four previously mentioned substances are capable of forming para-quinonoid derivatives.1 (c) It appears that only those aromatic amino and ketonic acids are capable of yielding acetoacetic acid when perfused through a surviving liver which possess the side-chain--It is essential that the hydrogen of the CH2 group adjacent to the nucleus be unsubstituted. Thus phenylserine, C6H6. CHOH. CHNH2. COOH, although structurally so similar to phenylalanine, is converted into hippuric acid in the animal body (Dakin). A consideration of its formula will show that it cannot yield acetoacetic acid in the same way as phenylalanine and tyrosine do, if the scheme suggested for the catabolism of the latter substance be correct.2 (d) If the acetoacetic acid be formed from phenylalanine and tyrosine in the manner indicated, an adequate explanation is afforded of the striking differences in the behaviour of other aromatic substances. The reason of the failure of phenylaminoacetic acid, 7phenyl-a-aminobutyric acid and their derivatives to undergo complete oxidation in the body may reasonably be referred to the structural impossibility of their yielding acetoacetic acid along the lines believed to represent phenylalanine catabolism. Similarly, the phenyl-fatty acids, which when possible undergo /S-oxidation, can neither yield acetoacetic acid nor undergo complete oxidation. Furthermore, the failure of tryptophane to yield acetoacetic acid, although it does apparently undergo complete oxidation in the animal body, may.

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Von Händler/Antiquariat, profnath.
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...secondly, substances of quinonoid structure which are believed to be necessary precursors of homogentisic acid (p. 69) are not necessarily formed in the catabolism of the aromatic amino and ketonic acids which undergo complete oxidation in the body, since none of the four previously mentioned substances are capable of forming para-quinonoid derivatives.1 (c) It appears that only those aromatic amino and ketonic acids are capable of yielding acetoacetic acid when perfused through a surviving liver which possess the side-chain--It is essential that the hydrogen of the CH2 group adjacent to the nucleus be unsubstituted. Thus phenylserine, C6H6. CHOH. CHNH2. COOH, although structurally so similar to phenylalanine, is converted into hippuric acid in the animal body (Dakin). A consideration of its formula will show that it cannot yield acetoacetic acid in the same way as phenylalanine and tyrosine do, if the scheme suggested for the catabolism of the latter substance be correct.2 (d) If the acetoacetic acid be formed from phenylalanine and tyrosine in the manner indicated, an adequate explanation is afforded of the striking differences in the behaviour of other aromatic substances. The reason of the failure of phenylaminoacetic acid, 7phenyl-a-aminobutyric acid and their derivatives to undergo complete oxidation in the body may reasonably be referred to the structural impossibility of their yielding acetoacetic acid along the lines believed to represent phenylalanine catabolism. Similarly, the phenyl-fatty acids, which when possible undergo /S-oxidation, can neither yield acetoacetic acid nor undergo complete oxidation. Furthermore, the failure of tryptophane to yield acetoacetic acid, although it does apparently undergo complete oxidation in the animal body, may... Paperback, Label: RareBooksClub.com, RareBooksClub.com, Produktgruppe: Book, Publiziert: 2012-05-08, Studio: RareBooksClub.com.

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Von Händler/Antiquariat, Amazon.com.
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...secondly, substances of quinonoid structure which are believed to be necessary precursors of homogentisic acid (p. 69) are not necessarily formed in the catabolism of the aromatic amino and ketonic acids which undergo complete oxidation in the body, since none of the four previously mentioned substances are capable of forming para-quinonoid derivatives.1 (c) It appears that only those aromatic amino and ketonic acids are capable of yielding acetoacetic acid when perfused through a surviving liver which possess the side-chain--It is essential that the hydrogen of the CH2 group adjacent to the nucleus be unsubstituted. Thus phenylserine, C6H6. CHOH. CHNH2. COOH, although structurally so similar to phenylalanine, is converted into hippuric acid in the animal body (Dakin). A consideration of its formula will show that it cannot yield acetoacetic acid in the same way as phenylalanine and tyrosine do, if the scheme suggested for the catabolism of the latter substance be correct.2 (d) If the acetoacetic acid be formed from phenylalanine and tyrosine in the manner indicated, an adequate explanation is afforded of the striking differences in the behaviour of other aromatic substances. The reason of the failure of phenylaminoacetic acid, 7phenyl-a-aminobutyric acid and their derivatives to undergo complete oxidation in the body may reasonably be referred to the structural impossibility of their yielding acetoacetic acid along the lines believed to represent phenylalanine catabolism. Similarly, the phenyl-fatty acids, which when possible undergo /S-oxidation, can neither yield acetoacetic acid nor undergo complete oxidation. Furthermore, the failure of tryptophane to yield acetoacetic acid, although it does apparently undergo complete oxidation in the animal body, may... Paperback, Label: RareBooksClub.com, RareBooksClub.com, Produktgruppe: Book, Publiziert: 2012-05-08, Studio: RareBooksClub.com.

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Books Group Staff, Paperback, English-language edition, Pub by General Books LLC.