Firefly luciferase was immobilized on epoxy methacrylate beads and used for a continuous-flow assay of ATP extracted from platelets. The immobilized luciferase had a half-life of 3 days at 25 degrees C; there was a 25% recovery of luciferase activity upon immobilization, and ca 50 reactors were made from 1 mg of commercial enzyme. The sensitivity of the assay was 0.3 pmol of ATP, and the response was linear between 1 and 500 pmol of ATP. The ATP content of platelets obtained with the present method correlated well with those obtained using soluble luciferase.
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Carrea et al. (1989) studied this question.
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