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Biomedical subjects

M Kojima

Publications and source records attributed to M Kojima.

At least 991 records · Page 55Linked to original sources
PubMed1975

Bioconversion of ribostamycin (SF-733). II. Isolation and structure of 3-N-acetylribostamycin, a microbiologically inactive product of ribostamycin produced by Streptomyces ribosidificus.

The isolation and structure determination of 3-N-acetylribostamycin, a microbiologically inactive derivative, produced enzymatically from ribostamycin by Streptomyces ribosidificus is described. The location of the acetyl group was established by mass and NMR spectrometry of the new compound and its derivatives, and by optical rotation studies conducted on N-ethoxycarbonyl-2-deoxystreptamine. The latter compound was obtained by partial acid hydrolysis of tri-N-ethoxycarbonyl-N-acetylribostamycin.

Acetyltransferases↗
PubMed1975

Bioconversion of ribostamycin (SF-733). III. Formation, structure and synthesis of 3-N-carboxymethyl ribostamycin.

A new inactivated product of ribostamycin (SF-733), 3-N-carboxymethyl ribostamycin, was obtained from the broth of Streptomyces ribosidificus which was grown on a medium containing D-xylose. Detection and some biochemical mechanism of N-carboxymethylation were discussed, and structure of 3-N-carboxymethyl ribostamycin was proposed based on the chemical degradation and synthesis.

Anti-Bacterial Agents↗
PubMed1975

New adrenal-scanning agent.

A new adrenal-specific compound, 6beta-iodomethyl-19-norcholest-5(10)-en-3beta-ol(NCL-3-I), which is derived from 19-iodocholesterol (CL-19-I), has been found. Tissue distribution studies have revealed that the rat adrenal gland accumulates ten times more NCL-6-131-I than CL-19-131-I. The advantage of NCL-6-131-I as a possible adrenal-scanning agent is discussed.

Adrenal Gland Diseases↗