Sigma procedure SPBAPN02.001, A6012, revised 22 December 1997. Sigma is the institutional issuer; Merck Millipore hosts this copy. No personal byline or original publication date is established.
Additional cited passages: p. 2, approximately five-minute recording and linear slope; p. 3, notes 1–2, substrate quality and 40–60 percent inhibition criterion.
