MM1.S cell growth stimulated with OCL-CM is blocked by an anti-AXII Ab. MM1.S cells were cultured in the presence of AXII^+/+ OCL-CM or AXII^−/− OCL-CM. (A) MM1.S cells were cultured for 72 hours. After 72 hours, the number of viable MM1.S cells was counted. (B) Anti-p11 or anti-p36 Abs were added to the MM1.S cells that were stimulated with either AXII^+/+ OCL-CM or AXII^−/− OCL-CM.