Epitope determination of mAb CLB-ANA/60 on histone immunoblot. (A) 20% SDS-PAA gel with histones, silver staining. (B) Histone immunoblot incubated with 2.5 µg/ml mAb CLB-ANA/60. Lane M, 100 kDa protein marker; lane 1, histone 1; lane 2, histone 2A; lane 3, histone 2B; lane 4, histone 3; lane 5, histone 4.