Abstract
A commercially available, wheat lectin, inhibitor of human salivary-type iso-amylase was tested on amylase activity in saliva, urine and other materials. Amylase activity was inhibited to a much greater degree in saliva than in urine or other materials. Though amylase activity in saliva and urine was very variable, the degree of inhibition of activity in each of these fluids was relatively constant. Further, though amylase activity declined rapidly with time in saliva stains, no such rapid decline was found in the degree of inhibition of residual activity. A high degree of inhibition can therefore be used to give increased confidence in the identification of saliva stains.
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