Schlafen proteins are produced in response to interferon signalling, which can be activated by retroviral infection; this study shows that human schlafen 11 inhibits the late stages of HIV-1 production by binding non-specifically to tRNAs, thus preventing the expression of viral proteins.

Ultrahigh-resolution X-ray crystallography study of a phosphate-binding protein from Pseudomonas fluorescens yields insight into how phosphate ions essential for life are discriminated from the arsenate ions inimical to it, even in arsenate-rich environments.