title: A rapid, flexible method for biochemical assays using a microtiter plate reader and a microcomputer. Application for assays of protein, Na,K-ATPase and K-p-nitrophenylphosphatase.
abstract: A computerized system which greatly accelerates and eases the collection, storage, and analysis of data has been applied to several standard biochemical assays. The system uses a commercially available microtiter plate reader connected to an Apple IIe microcomputer via a standard serial port. Data are transmitted automatically from the reader to the microcomputer, where they can be viewed, printed, further analyzed immediately, or stored on a diskette for later retrieval and processing. Some or all of the data may be entered manually. The program calculates a linear least squares best fit to a standard curve after correcting all data for blanks, then determines the quantities of substrate or product contained in each well of a microtiter plate. Data from two plates may be combined, enabling calculation of enzyme specific activities. This system can be adapted to any assay whose final step can be performed by a microtiter plate reader. Its use is described for determination of protein concentration, Na,K-ATPase activity, and K-stimulated p-nitrophenylphosphatase activity.
mesh_terms: D009597:4-Nitrophenylphosphatase / Q000032:analysis*; D000818:Animals; D003201:Computers; D008838:Microcomputers; D010744:Phosphoric Monoester Hydrolases / Q000032:analysis*; D011506:Proteins / Q000032:analysis*; D000254:Sodium-Potassium-Exchanging ATPase / Q000032:analysis*; D012984:Software
chemical_list: D011506:Proteins; D010744:Phosphoric Monoester Hydrolases; D009597:4-Nitrophenylphosphatase; D000254:Sodium-Potassium-Exchanging ATPase