G. Houen et al., COMBINED IMMUNOSTAINING AND COOMASSIE-BRILLIANT-BLUE STAINING OF POLYVINYLIDENE DIFLUORIDE MEMBRANES WITHOUT ORGANIC-SOLVENT, Electrophoresis, 18(5), 1997, pp. 701-705
A method for staining proteins on polyvinylidene difluoride membranes
without using organic solvent is described. The method uses preblockin
g of the membrane with either Tween 20 or polyethylene glycol followed
by staining with 0.01% Coomassie Brilliant Blue. No destaining of the
membrane is needed afterwards. Preblocking with polyethylene glycol i
s compatible with microsequencing while Tween 20 leads to very low ini
tial yields. Preblocking with Tween 20 has the additional advantage of
allowing immunostaining followed by Coomassie Brilliant Blue staining
for total protein on the same membrane.