ARF; CD2A1; CDK4 inhibitor p16-INK4; CDK4I; CDKN2; CDKN2A; cell cycle negative regulator beta; CMM2; Cyclin-dependent kinase 4 inhibitor A; cyclin-dependent kinase inhibitor 2A (melanoma, p16, inhibits CDK4); cyclin-dependent kinase inhibitor 2A, isoform