Profile: Life Science Tek specializes in providing enzyme substrates, dry test strips, and free radical assay kits. Enzyme substrate is used to produce a detectable signal including changes in color, fluorescence or luminescence. Its use provides a useful power tool to measure enzymatic activity or qualify/quantify analyte marked by enzyme, especially in application of biomedical, food, and environmental fields, for example, in ELISA, western, southern & northern blotting assay. Dry test strip is a test pad bonded on a supporter, such as a plastic strip, and the test pad is impregnated with dry chemicals/materials. When the test pad exposes to a test sample, analyte in sample will react with the chemicals in the pad and change the color of pad, which can easily be seen or measured with eye or reader.