Dot matrix analysis of the putative CGM6 gene promoter region and corresponding regions from other members of the human CEA gene family. Dot matrix sequence alignments were performed between the promoter regions of CGM6 and PSG1 (A), CGM1(B), NCA (C), and CEA (D); between NCA andCGM1 (E); and between NCA and CEA (F). In all cases, 800 nucleotides upstream from the translational start site (ATG) were compared and the stringency was set at 12 from 20 nucleotides conserved to register a dot.