Mutations in XPD helicase prevent its interaction and regulation by p44, another subunit of TFIIH, resulting in Xeroderma pigmentosum (XP) and trichothiodystrophy (TTD) phenotypes.
F. Coin et al., Mutations in XPD helicase prevent its interaction and regulation by p44, another subunit of TFIIH, resulting in Xeroderma pigmentosum (XP) and trichothiodystrophy (TTD) phenotypes., PATH BIOL, 46(9), 1998, pp. 679-680