DEVIATIONS FROM MICHAELIS-MENTEN KINETICS - THE POSSIBILITY OF COMPLICATED CURVES FOR SIMPLE KINETIC SCHEMES AND THE COMPUTER FITTING OF EXPERIMENTAL-DATA FOR ACETYCHOLIN-ESTERASE, ACID-PHOSPHATASE, ADENOSINE-DEAMINASE, ARYLSULFATASE, BENZYLAMINE OXIDASE, CHYMOTRYPSIN, FUMARASE, GALACTOSE DEHYDROGENASE, BETA-GALACTOSIDASE, LACTATE-DEHYDROGENASE, PEROXIDASE AND XANTHINE-OXIDASE-D