Effects of phospholipase B or taxol on enhanced binding of 70-kD N-terminal fragment of fibronectin to MG63 cells by LPA, nocodazole, or S1P. Confluent MG63 cells were pretreated with complete medium (None), 1,000 U/L phospholipase B (PLB), or 20 μmol/L taxol (Taxol) for 2 hours and were then incubated for 60 minutes with¹²⁵I-70-kD fragment in medium with 200 nmol/L LPA (▩), 10 μmol/L nocodazole (), or 100 nmol/L S1P (▪). Data are presented as the specific binding in the presence of additive divided by specific binding in the absence of any additives as a percentage of control. Data represent the mean ± SD (n = 4).