title: Quantitative western blotting using [gamma-33P]ATP and the ultrasensitive bio-imaging analyzer.
abstract: This report describes a method for simultaneous quantitative determination of antigens from protein blots based on the highly sensitive "contact-copy" procedure, applying the phosphorylation reaction as a general detection principle. Using ultrasensitive bio-imaging analyzer systems permits us to quickly and easily quantify single bands directly from the picture screen and to achieve a high-resolution printing of the image (pictography). By applying a new kanamycin loading procedure it is possible to use phosphocellulose paper P81 as a substrate matrix. Replacing 32P with 33P as a detection isotope leads to an improvement of the sensitivity, resolution, and safety. The method is applied to analyze the proteins dystrophin, myosin, vinculin, and desmin from human tissue lysates. The high sensitivity of the procedure (detection limit approximately 1 pg dystrophin) permits determination of the quantity of dystrophin in very small tissue biopsy samples, which is of special interest for Duchenne/Becker muscular dystrophy diagnosis.
authors.affiliation: Department of Human Molecular Genetics, Max-Delbrück-Center for Molecular Medicine, Berlin, Federal Republic of Germany.
authors.forename: H D
authors.initials: HD
authors.lastname: Hunger
authors.forename: G
authors.initials: G
authors.lastname: Schmidt
authors.forename: C
authors.initials: C
authors.lastname: Flachmeier
mesh_terms: D000255:Adenosine Triphosphate / Q000032:analysis*; D000328:Adult; D000818:Animals; D015153:Blotting, Western; D002138:Calibration; D002648:Child; D003937:Diagnosis, Differential; D016189:Dystrophin / Q000032:analysis*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008832:Microchemistry / Q000379:methods; D009124:Muscle Proteins / Q000032:analysis; D009136:Muscular Dystrophies / Q000175:diagnosis; D010761:Phosphorus Radioisotopes; D012680:Sensitivity and Specificity
chemical_list: D016189:Dystrophin; D009124:Muscle Proteins; D010761:Phosphorus Radioisotopes; D000255:Adenosine Triphosphate