In what form can the antigen be supplied?

Lyophilized, dissolved or precipitated in buffer (concentration 0.1-1mg/ml or higher), in nitrocellulose, in polyacrylamide gel – Coomassie-staining is possible; as pieces which are pH-neutral (as a result of being washed 2-3x in water) and kept moist (in distilled water), up to a maximum of 1000 µl of swollen gel per injection