Western blot using PTENP1 polyclonal antibody (Cat # PAB9923) shows detection of endogenous PTENP1 in whole cell lysates from human derived cell lines HeLa (Lane 4), HEK293 (Lane 5) and MCF-7 (Lane 6). The band at ~55 KDa (arrowhead) corresponds to PTENP1. Lanes 1-3 were show the results of staining after the antibody was first pre-incubated with the immunizing peptide. The identity of lower molecular weight bands in lane 4 is unknown. Briefly, each lane contains approximately 35 ug of lysate. Primary antibody was used at a 1 : 500 dilution in 5% BLOTTO in PBS reacted overnight at 4°C. The membrane was washed and reacted with a 1 : 10,000 dilution of IRDye800™ conjugated Gt-a-Rabbit IgG [H&L] MX for 45 min at room temperature (800 nm channel, green). Molecular weight estimation was made by comparison to prestained MW markers in lane M (700 nm channel, red). IRDye™800 fluorescence image was captured using the Odyssey® Infrared Imaging System d