Normal tissues: Oligonucleotide hybridization of PCR-amplified DNA and RNA is shown on the left and right of the figure, respectively. The results were quantified by dividing the ratio of RNA expression by the ratio of genomic copies in DNA. A ratio of 1 indicates that both alleles are expressed at comparable levels. HMC-3 and HMC-4 are control oligonucleotides having a G and a T at position 2677. Samples 1 through 6, normal adrenal gland; 7, normal kidney; 8 and 9, normal lung; 10 and 11, normal colon.