منابع مشابه
A new synthesis of djenkolic acid.
Several years ago considerable interest was aroused by the discovery by van Veen and Hyman (1) of a new naturally occurring sulfur-containing amino acid which they had isolated from the djenkol bean (Pithecolobium lobatum) and named djenkolic acid. They showed that it was probably the cysteine thioacetal of formaldehyde. This structure was confirmed by du Vigneaud and Patterson (2) who synthesi...
متن کاملStructural modeling of djenkolic acid with sulfur replaced by selenium and tellurium.
The comparative structural modeling of djenkolic acid and its derivatives containing selenium and tellurium in chalcogen sites (Ch=Se, Te) has provided detailed information about the bond lengths and bond angles, filling the gap in what we know about the structural characteristics of these aminoacids. The investigation using the molecular mechanics technique with good approximation confirmed th...
متن کاملThe Use of 13C in the Synthesis of Double Labelled Precursors
Discovery of 13C NMR and its application in the biosynthetic pathways prompted the synthesis of several 13C labelled precursors. To investigate the metabolism of phenyllactic acid in the Solanaceae family, the double labelled acid was synthesized from barium carbonate (13C) and sodium syanide (13C)
متن کاملThe preparation of [35S]homocysteine thiolactone free of [35S]methionine.
The unambiguous study of homocysteine metabolism requires a source of [355]homocysteine completely free from contaminating [35S]methionine. Until now, such a reagent has not been readily available. Homocysteine is an important metabolite involved in methionine, cysteine and methylation metabolism. Homocysteine can be methylated to form methionine with either 5-methyltetrahydrofolate [1] or beta...
متن کاملGrowth stimulation of Staphylococcus aureus by L-cystine or L-djenkolic acid.
J. B. Egan and M. L. Morse (Biochim. Biophys. Acta 97:310, 1965) reported a defined medium which would support the growth of Staphylococcus aureus NCTC8511 for several generations if a peptone medium culture was diluted into it. In our hands, cultures of S. aureus NCTC8511 or S. aureus HS1159 (obtained from R. Z. Korman, Department of Physical Biology, Cornell University, Ithaca, N.Y.) maintain...
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ژورنال
عنوان ژورنال: Medical Journal of Indonesia
سال: 1992
ISSN: 2252-8083,0853-1773
DOI: 10.13181/mji.v1i3/4.3613