RT-PCR of cDNA from murine eosinophils isolated from liver granulomas of S mansoni-infected mice. Different positive controls to check the PCR reactions were used. D10.3M.24, a murine Th2 clone transfected with Fc-ε RII/CD23, was a positive control for CD2 and CD23 (CD2-ctl, CD23-ctl). J774, a murine peritoneal macrophage cell line, was a positive control for Fc-γ RI. P815, a murine mastocytoma cell line, was a positive control of the Fc-ε RIα subunit. BAL 17, a murine B-cell line, was a positive control for B29.