Abstract
Summary
The activity-temperature relationship for choline-esterace in horse serum was investigated and a narrow optimum at 40° was observed. The decreased activity above 40° is believed to result from two factors, a slowing of the reaction independent of enzyme destruction, and destruction itself, first found to occur at 50°. The course of the reaction was not appreciably affected by a change in temperature from 25 to 40°. Temperature coefficients and constants for the action of this enzyme were calculated.
The author wishes to thank Mr. Sidney Morett for technical aid in this investigation.
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