Plasmacytoma induction curves that compare (a) responses of C.D2 I/P (I/P) and BALB/cAnPt (B/C) mice to three doses of 0.5 mL pristane given on days 0, 60, and 120; and (b) responses of C.D2 I/P mice to three different dose regimens of pristane. The numbers of mice and the percentages at 25-day intervals are given in Table 1. Note that C.D2 I/P mice develop a higher incidence of PCTs more rapidly than BALB/c.