With the species-specific antisera, there were significantly (P < 0.05) lower (∼20% to 50%) levels of Ng-ACP present in P9-17 OM than in MC58 OM, and with the cross-reacting rNm-ACP serum, this difference was ∼53% (P < 0.05) (Fig. 8). This evidence concerns the gene NRGN and ocular melanoma.