UVB对绵羊黑色素细胞中GPNMB和PMEL的影响 ,赵兵令,刘颖,非转移性黑色素瘤糖蛋白b(Glycoprotein nonmetastatic melanoma protein b,GPNMB)及其同系物色素细胞特异性黑色素细胞蛋白(Pigment cell-specific melan