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SDS–PAGE analysis of secretory products from Streptococcus parasanguinis and Rothia dentocariosa. Marker (lane 1), S. parasanguinis (undiluted extract) (lanes 2–4), R. dentocariosa (undiluted extract) (lanes 5–6), S. parasanguinis (diluted 1:1) (lanes 7–9), and R. dentocariosa (diluted 1:1) (lanes 10–11).
