p53RFP, a p53-inducible RING-finger protein, regulates the stability of p21WAF1.
Ng CC, Arakawa H, Fukuda S, Kondoh H, Nakamura Y. p53RFP, a p53-inducible RING-finger protein, regulates the stability of p21WAF1. Oncogene. 2003 Jul 10; 22(28):4449-58.