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(A) Immunoblot analysis of PSA. Lane 1, size markers; lane 2, PSA. (B) Gas chromatography-mass spectrometry chromatogram of derivatized PSA. Peaks: 10.75 min, d-xylose; 13.82 min, d-mannose; 16.14 min, d-glucose; 20.95 min, N-acetyl-d-glucosamine.
