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SDS/PAGE and colloidal Coomassie blue staining of total colostral milk (milk), CA purified from colostral milk (M CA VI; 0.2 μg, left lane; 0.6 μg, right lane), and CA purified from saliva (S CA VI). The ≈42-kDa polypeptides are seen in CAs purified from both milk and saliva. A polypeptide of similar size is also visible in the total milk sample.
