Figure 1 - Detection of biotinylated polypeptides on nitrocellulose sheets using a streptavidin-HRP conjugate. a, Molecular mass standards; b, cercariae labeled with BcapNHS; c, unlabeled cercariae; d, cercarial bodies from labeled cercariae; e, unlabeled bodies; f, cercarial tails from labeled cercariae; g, unlabeled tails; h, cercarial bodies and i, tails labeled with BcapNHS after isolation on a Percoll gradient.