Expression of P450RAI-2 in human tissues. (A) RNA samples from 76 normal human tissues were probed for expression of P450RAI-2 transcripts by using a commercially available dot blot. Signals representing P450RAI-2 transcripts are observed in three samples, a2, b2, and h1, representing left and right cerebellum and pons, respectively. (B) Control hybridization with a human ubiquitin probe. (C) Northern blot analyses for expression of P450RAI-2 in human brain. Transcripts at approximately 5 kb corresponding to P450RAI-2 are indicated.