Units of Enzyme Activity

Recommendations 1978


  • Comments and suggestions for future revisions may be sent to any member of the committee: P. Karlson (chairman), H. Bielka, B. L. Horecker, W. B. Jakoby, B. Keil, C. Liébecq (as chairman of the IUB Committee of Edition of Biochemical Journals), B. Lindberg and E. C. Webb, or its secretary: H. B. F. Dixon, University Department of Biochemistry, Tennis Court Road, Cambridge, England, CB2 1QW.

  • 1The term ‘rate of reaction’ as used in this document follows the definition of reference 4 and signifies a quantity with dimensions (amount of substance)/time (units: mol · s−1). We should point out that these words are often used for a quantity with dimensions (amount-of-substance concentration)/time (units: mol · dm−3· sC1). This discrepancy and a proposal to call the former (extensive) quantity ‘rate of conversion’ and the latter (intensive) quantity ‘rate of reaction’ are being considered by a IUPAC Subcommittee on Symbolism and Terminology in Chemical Kinetics (Chairman: K. J. Laidler, Department of Chemistry, University of Ottawa. Ottawa, Canada, KIN 6N5, to whom comments may be sent).

  • Editorial Comment. These Recommendations are being published as a service to the biochemical community. Publication does not imply endorsement of the recommendations by the journals but rather presents this information for consideration.

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