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J Dent Res 36(5): 713-716, 1957
© 1957 International and American Associations for Dental Research
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ENZYMES OF HUMAN SALIVA

II. PAROTID SALIVA TOTAL ESTERASES

HOWARD H. CHAUNCEY 1, FABIAN LIONETTI 1, and VINCENT F. LISANTI 1

1 Department of Dental Research, Tufts University School of Dental Medicine, and the Department of Biochemistry, Boston University School of Medicine, Boston, Mass.

Investigation of the enzymatic hydrolysis of beta-naphthylacetate by human parotid saliva indicated a pH optimum of 8.6 for parotid saliva total esterases. The Michaelis-Menten constant was calculated to be 1.45 x 10-3M. A linear relationship between saliva volume and amount of substrate hydrolyzed was observed. The energy of activation was 5,900 cal. per mole. Maximum activity occurred at 60° C. The temperature coefficient (Q10) for the interval 35° to 45° C. was 1.38

Submitted on November 30, 1956






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