title: Calculation of antibody and antigen concentrations from ELISA data using a graphical method.
abstract: A graphical method for determining the concentration of either the antibody or the antigen from ELISA data is presented in the form of a GWBASIC program. In the program, ELISAEQ, optical densities (OD) obtained from a 96-well ELISA plate can be input either directly by interfacing a microplate reader to the computer or manually. The program uses standard sample data, and selects the semilogarithmic linear range. Over this range, a least-squares method is used to determine the concentrations of interest. In addition, a hyperbolic interpolation formula is derived over the entire range for estimating the antibody or antigen concentration of the unknown samples whose OD is beyond the linear range.
authors.affiliation: Institute of Microbial Technology, Sector 39A, Chandigarh, India.
authors.forename: G P
authors.initials: GP
authors.lastname: Raghava
authors.forename: A K
authors.initials: AK
authors.lastname: Joshi
authors.forename: J N
authors.initials: JN
authors.lastname: Agrewala
mesh_terms: D000906:Antibodies / Q000032:analysis*; D000941:Antigens / Q000032:analysis*; D004797:Enzyme-Linked Immunosorbent Assay; D012984:Software
chemical_list: D000906:Antibodies; D000941:Antigens