hygromycin phosphotransferase

[Glenn Cantor]

I have transfected cells with a plasmid containing a hygromycin 
selectable marker.  To compare transfection efficiency in various 
cell lines, I would like to compare the amounts of hygromycin 
phosphotransferase which the lines express.  Does anyone know if 
antibodies or an antibody-based kit are available for detection of 
hygromycin phosphotransferase?  (5'-3' has an ELISA for detection of 
neomycin phosphotransferase II, but doesn't have one for hygromycin.)

Thanks!

Debra Hoover