Similarly, triple mutants that are heterozygous for a p27 null allele(Nkx3.1+/− or −/−; Pten+/−; p27+/−) display enhanced prostate carcinogenesis, whereas mice that are homozygous null for p27(Nkx3.1+/− or −/−; Pten+/−; p27−/−) show inhibition of cancer progression29. The gene discussed is NKX3-1; the disease is prostatitis.