Measurement of alpha-amylase activity in cat plasma: test of specificity of a chromogenic substrate, reference values.


Glucoamylase activity can interfere with the measurement of alpha-amylase activity in cat plasma. This can be avoided by the use of "blocked" substrates such as 4,6-O-benzylidene-4-nitrophenyl-alpha-D-maltoheptaoside. In 241 healthy cats, reference values were 586 +/- 241 U/L (m +/- standard deviation) at 30 degrees C; age, sex, overnight fasting, and mild hemolysis had no significant effect.


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