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Southern blot of C. roseus genomic DNA. An antisense DIG-labeled oligonucleotide complementary to a 39-base segment of intron I was used as probe. DNA was digested with NcoI (lane 1), Van91I and EcoRI (lane 2), and HincII (lane 3). Arrows indicate bands, and numbers on the left indicate positions of the DNA Mr markers in kilobase pairs.
