Figure 1From: Comparison of the inhibitory effects of three transcriptional variants of CDKN2A in human lung cancer cell line A549The three transcriptional variants of CDKN2A. The CDKN2A gene located at 9p21 generates three transcriptional variants at transcription: p16INK4a, p14ARF and p12. p16INK4a utilizes exon1α, and p14ARF utilizes exon 1β which is about 20 kb upstream of exon 1α. p16INK4a and p14ARF share common exon 2 and exon 3 but use different reading frames. p12 uses an alternative splice donor site within intron1 of p16INK4a.Back to article page