Drs. Harry Nick & Justin Bickford publishes in Sept 25, 2013 issue of Microbiology Published On September 27, 2013 Social Media Share this article Facebook Twitter LinkedIn Bickford JS, Nick HS. Conservation of the PTEN catalytic motif in the bacterial undecaprenyl pyrophosphate phosphatase, BacA/UppP. Microbiology 2013.