This guest post is by Lisa Krugner-Higby, DVM, PhD.  Dr. Krugner-Higby is a scientist and also a research veterinarian within the Research Animal Resource Center at the University of Wisconsin-Madison. Dr. Krugner-Higby’s research is in development of extended-release formulations of analgesic and antimicrobial drugs. She previously worked in anti-HIV drug development. I am always fascinated … Continue reading En Passage, an Approach to the Use and Provenance of Immortalized Cell Lines