Figure 4. Effects of bacterial extracellular products (EP) on settlement of C. intestinalis larvae after a 48 hrs incubation. (Orig) = untreated EP; (d) = heat denatured EP; (1:2) and (1:10) = EP dilutions; Ni1 > 3,500 and Ni1 > 10,000 = dialyzed fractions of EP; protease and peptidase = EP enzymatic treatments. All values are the results of three replicate trials. Controls: SW = seawater; MMM = marine minimal medium; Pt and Hm = positive control bacterial strains. Vertical bars = ± standard errors.