Concepedia

John J. Usher

JJ

15

Publications

413

Citations

13

H-Index

1975

Active since

Affiliations

Bristol-Myers Squibb (United States)(Current)

University of Oxford

Bristol-Myers Squibb (Germany)

John J. Usher is an author at Bristol-Myers Squibb (United States) specializing in biochemistry, engineering, and biosynthesis.

Top concepts

Publications per year

1975–1997

15

Publications

15

Synthesis of δ-(α-aminoadipyl)cysteinylvaline and its role in penicillin biosynthesis

Patricia Fawcett, John J. Usher, Joyce A. Huddleston et al. · Biochemical Journal · 1976 · 85 citations · Full text

Behaviour of tritium-labelled isopenicillin N and 6-aminopenicillanic acid as potential penicillin precursors in an extract of Penicillum chrysogenum

Patricia Fawcett, John J. Usher, E. P. Abraham · Biochemical Journal · 1975 · 51 citations · Full text

Cell-free biosynthesis of penicillins. Conversion of peptides into new .beta.-lactam antibiotics

Gulam Bahadur, Jack E. Baldwin, John J. Usher et al. · Journal of the American Chemical Society · 1981 · 38 citations

, , +23

Synthesis of δ-(<scp>L</scp>-α-aminoadipoyl)-<scp>L</scp>-cysteinyl-<scp>D</scp>-valine and some carbon-13 and nitrogen-15 labelled isotopomers

Jack E. Baldwin, Stephen R. Herchen, Brian L. Johnson et al. · Journal of the Chemical Society Perkin Transactions 1 · 1981 · 29 citations

, , +14

Purification and characterization of a cephalosporin esterase from Rhodosporidium toruloides

M Politino, S M Tonzi, William Burnett et al. · Applied and Environmental Microbiology · 1997 · 26 citations · Full text

, , +14

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