Happy to report that Johanna (new lab manager extraordinaire!) has been able to generate novel anti-PSMA imaging probes that are specific for the cell surface.  This appears to be the best imaging probe for PSMA to date.  The other ones appear to get taken up by cells whereas its best for our applications if the epitope is cell surface specific.  Our goal is to make this probe free for all collaborators.  (YES!  FREE!)  Following in the footsteps of Leland Chung making cell lines free for all interested parties.