title: A case of cross-reactivity.
abstract: Studies using chemical inhibitors have suggested that p38 MAP kinase is a key regulator of Wnt/β-catenin signaling. In this issue, Verkaar et al. (2011) show that cross-reactivity of p38 inhibitors with casein kinase Iδ/ɛ is responsible for Wnt/β-catenin pathway inhibition.
authors.affiliation: Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center Utrecht, Uppsalalaan 8, 3584 CT, Utrecht, The Netherlands. r.korswagen@hubrecht.eu
authors.forename: Hendrik C
authors.initials: HC
authors.lastname: Korswagen