FIG. 1.

β₁ staining in HGF incubated for 1 h with culture supernatant from strains W50 (●) and W50/BE1 (○). The maximum concentration of each supernatant used was a 1/2 dilution in DMEM. The arginine-specific enzyme activities of doubling dilutions of the culture supernatants are shown on a log₂ scale. Integrin staining was graded as described in Materials and Methods. The results represent the mean integrin grade ± standard error (SE) from five separate experiments for W50 and three for W50/BE1. Integrin staining in control cultures incubated in DMEM is indicated by the dotted line.