Harper College 1 article published in JoVE Bioengineering Colorimetric Analysis of Alkaline Phosphatase Activity in S. aureus Biofilm Kevin M. Danikowski1, Tong Cheng1 1Department of Biology, Harper College In this manuscript, we established a high throughput method to quantify alkaline phosphatase activity in S. aureus biofilm culture from 96-well tissue culture plate