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Western blot with MAb 5332 (against OspA). Lane M, molecular mass standards; lane 1, SCCH-17; lane 2, SCCH-12; lane 3, SCCH-11; lane 4, SCCH-8; lane 5, SCCH-2; lane 6, SCCH-1; lane 7, B. burgdorferi B-31 (reference strain).