Expression of mRNA for MIP-1α at day 13 after transfer of either C57BL/6 or MIP-1α^−/− B6 splenocytes.

RNA was extracted from the various tissues as indicated in the text and evaluated by RPA. The quantity of mRNA for each condition was normalized to the expression of GAPDH. We evaluated 3 mice per condition, and the data were pooled from 3 separate experiments. P values were analyzed using the Studentt test. *P < .001, which compares the difference of MIP-1α^−/− and MIP-1α^+/+ for class I and class II; **P = .03.