L-Alanlne

S)-N-(9-PHENYLFLUOREN-9-YL) ALANINE AND (S)-DIMETHYL N-(9-PHEN YLFLU0REN-9-YL)ASPARTATE L-Alanlne, N-(9-phenyl-9H-fluoren-9-yl)- and L-Aspartic acid, N-(9-phenyl-9H-fluoren-9-yl>, dimethyl ester)... 

Representative Configurations of Unperturbed Poly(L-alanlne) Chains" Erie, D. Darsey, J. A. Mattice, W. L. Macromolecules 1983, 16, 910. 

Based on these raw material costs, the use of L-alanlne In the manufacturre of most agricultural chemicals cannot be justified, even when a 30K reduction of raw material consumed is expected. 

Despite the range of species that have been Investigated, the variety of techniques used and the presence of some species differences in response (see, for example, O, there is considerable agreement between workers on the factors that govern neural response,irrespective of whether activity is recorded at a peripheral or higher level (16-19,6). For example, -amino acids elicit the maximum responses, and the most effective member of a chiral pair is the L-lsomer. (Of these, L-glutamlne or L-alanlne are the most powerful stimuli for the majority of species so far tested, but not for all). 

The muramyl-peptide analogues, N-t2-(D-glucos-3- -yl)propanoyl and -acetyl]-L-alanlne, (6) and (7) respectively, have been synthesized by standard procedure from l,2 5,6-di-0-lsopropylldene-o-... 

Other syntheses of diamino-sugars have employed non-carbohydrate starting materials. 6-epl-D-Purpurosamine D (100), a constituent of the antibiotic fortlmycln A, has been elaborated from the adduct (101) obtained by coupling the L-alanlne derived aldehyde (102) with the L-mallc acid derived Wittlg salt (103) (Scheme 25) the amino-... 

Some of the more interesting examples of nutrient - nonnutrient interactions include some of the compounds that are analogs of nutrients. Mattson et al (16) found that cholesterol absorption decreased when various plant sterols were added to the diets of rats. A number of plant amino acids are not ordinarily required by herbivores and are usually not incorporated into proteins. For example, the structure of 3,4-dihydroxyphenyl-alanlne (L-dopa) is similar to that of tyrosine. L-Dopa may play a role in favism (17), as well as having a number of other deleterious effects (18, 19, 20). Essential amino acids themselves can be deleterious if they are ingested in excessive quantities or if they are not in balance with other amino acids... 

L-Tryptophanyl-L-methlonyl-L-aspartyl-L-phenylalanine amide trifluoroacetate N t Butyloxycarbonyl 3 alanlne 2,4,5-trichlorophenyl ester... 

Menibrane preparations were simultaneously Incubated with 14c-labelled cinnamic acid and H-labelled L-phenyl-alanlne. 

B-Alanlne, reaction with di.-l-propynyl ketone, 615 a-Alanylamide, reaction with di- 1-propynyl ketone, 615 Alanylglycine, reaction with di-l-prop /n/l ketone, 615 6-(S-Alanyl)-i-hydroxy-2-pyri-done, 726... 

C.R. Scriver, W. Nutzenadel, and T.L. Perry, Disorders of /0-alanlne and carnosine metabolism, in "The Metabolic Basis of Inherited Disease", J.B. Stanbury, J. B. Wyndgaarden and D.S. Frederickson, eds., Ifth ed., McGraw-Hill, New York (1978). 

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