Scientific division, committee on enzymes IFCC methods for the measurement of catalytic concentration of enzymes Part 7. IFCC method for creatine kinase22This paper forms part of a series of recommendations on measurements of catalytic concentrations of enzymes. Others deal with: Part 1. General conditions, [1](Approved 1979). Part 2. Method for aspartate aminotransferase, [2](Approved 1985). Part 3. Method for alanine aminotransferase, [3](Approved 1985). Part 4. Method for γ-glutamyltransferase, [4]. Part 5. Method for alkaline phosphatase, [5]. Part 6. Reference materials for enzyme measurements (Stage 1, draft 1989 — copy available from Committee Chairman). (ATP: Creatine N-phosphotransferase, EC 2.7.3.2). IFCC recommendation