Posttranslational hydroxylation of ankyrin repeats in IkappaB proteins by the hypoxia-inducible factor (HIF) asparaginyl hydroxylase, factor inhibiting HIF (FIH). - Cockman, M; Lancaster, D; Stolze, I; Hewitson, K; McDonough, M; Coleman, M; Coles, C; Yu, X; Hay, RT; Ley, S; Pugh, C; Oldham, N; et al. (Proceedings of the National Academy of Sciences of the United States of America, 2006)