title: Retraction: Mode of binding of the antithyroid drug propylthiouracil to mammalian haem peroxidases.
abstract: The results in the article by Singh et al. [(2015), Acta Cryst. F71, 304-310] have been brought into question and the article is retracted.
keywords: antithyroid drug; distal haem side; lactoperoxidase; propylthiouracil; retraction