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(A) Ratios of in vitro differentiated haploid cells obtained following treatment with luzindole, 4-P-PDOT and T0901317 are shown. (B-D) MT1, MT2 and RORα expression in cells cultured with various melatonin receptor antagonists. (E) and (F) cAMP and testosterone concentrations in cells cultured with various melatonin receptor antagonists. Data are expressed as means ± SEM; * P < 0.05.
