Non-radiolabeled erythromycin, azithromycin, chloramphenicol, clindamycin, and linezolid were purchased from MilliporeSigma (USA). Unless stated otherwise, all other reagents and chemicals were obtained from MilliporeSigma (USA). Hygromycin A was isolated and purified from S. hygroscopicus strain NRRL-2388 as described previously49 (link),53 (link). A201A was kindly provided by Dr. Daniel Wilson. Ketolides (telithromycin and solithromycin) were provided by Cempra Inc (USA). Radioactively labeled [14C]-ERY was obtained from American Radiolabeled Chemicals (USA).
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