منابع مشابه
Enzymic O-methylation of Iodinated Phenols and Thyroid Hormones.
In spite of the broad substrat’e specificity of catechol O-methyltransferases from animal sources, none of the monohydric phenols serves as a good substrate. For example, the enzyme purified from rat liver by Axelrod and Tomchick (3) transformed epinephrine and other catecholes to their corresponding 3-O-methyl derivatives, but did not react with synephrine (p-hydroxyphenylmethylaminoethanol) o...
متن کاملGlucosylation of raffinose via alternansucrase acceptor reactions.
The glucansucrase known as alternansucrase [EC 2.4.1.140] can transfer glucosyl units from sucrose to raffinose to give good yields of oligosaccharides, which may serve as prebiotics. The main products were the tetrasaccharides alpha-d-Glcp-(1-->3)-alpha-d-Galp-(1-->6)-alpha-d-Glcp-(1<-->2)-beta-d-Fruf and alpha-d-Glcp-(1-->4)-alpha-d-Galp-(1-->6)-alpha-d-Glcp-(1<-->2)-beta-d-Fruf in ratios ran...
متن کاملRegioselective glucosylation of pyridoxine by microorganisms.
Microorganisms from culture collections and isolates from nature were screened for the ability to catalyze the regioselective glucosylation of pyridoxine (PN) to produce pyridoxine 5'-alpha-D-glucoside (PN-5'-alpha-G) or pyridoxine 4'-alpha-D-glucoside (PN-4'-alpha-G). Transglucosylation activity specific to 5'-position of PN was found in fungi belonging to genera such as Coriolus and Verticill...
متن کاملGlucosylation of Isoflavonoids in Engineered Escherichia coli
A glycosyltransferase, YjiC, from Bacillus licheniformis has been used for the modification of the commercially available isoflavonoids genistein, daidzein, biochanin A and formononetin. The in vitro glycosylation reaction, using UDP-α-D-glucose as a donor for the glucose moiety and aforementioned four acceptor molecules, showed the prominent glycosylation at 4' and 7 hydroxyl groups, but not a...
متن کاملGlucosylation of Deoxyribonucleic Acid by Enzymes
The deoxyribonucleic acid of bacteriophages T2, T4, and T6 contains glucose linked to the hydroxymethyl groups of hydroxymethylcytosine. The work of Sinsheimer, Volkin, Jesaitis, and of Lichtenstein and Cohen (l-4) established the presence of glucosyl-hydroxymethylcytosine residues in the deoxyribonucleic acid and indicated that there is a characteristic glucose to hydroxymethylcytosine ratio f...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biochemical Journal
سال: 1967
ISSN: 0306-3283
DOI: 10.1042/bj1050655