Inventors:
Frank J. Lucas - Baca Raton FL
Gerald E. Jaffe - Pembroke Pines FL
Steven E. Bott - Pembroke Pines FL
James H. Carter - Plantation FL
Assignee:
Coulter Corporation - Miami FL
International Classification:
C12Q 102, C12Q 100
Abstract:
A method for assaying the activity of an enzyme inside a metabolically active whole cell is disclosed. The assay compound includes a leaving group and an indicator group. The leaving group is selected from the group comprising amino acids, peptides, saccharides, sulfates, phosphates, esters, phosphate esters, nucleotides, polynucleotides, nucleic acids, pyrimidines, purines, nucleosides, lipids and mixtures thereof. The indicator group is selected from compounds which have a first state when joined to the leaving group, and a second state when the leaving group is cleaved from the indicator group by the enzyme. Preferably, the indicator compounds are rhodamine 110, rhodol, and fluorescein and analogs of these compounds. A method of synthesizing the compound is also disclosed.