Investigation of a failed DNA assay leads to identification of an unexpected contaminant in a commonly used chromatography buffer. - Kuhns, Scott T.; Semin, David J.; Soice, Neil P.; Kappes, Andy; Wong, H. Edward; Hwang, Tsang‐Lin; Soto, Robert J.; Csordas, Andrew T.; Wu, Alexander; Martinez‐Cano, Diandra; Babayan, Melin; Pelayo, Yesenia; et al. (Biotechnology Progress, 2023)