The PAS stain is based on oxidation of a 1,2 dialcohol to form a
dialdehyde followed by a double Schiff reaction of sulfate with the
aldehyde. So if a protein contains, or can be oxidized to, aldehyde
groups, it may be PAS positive.
--
Robertson D. Davenport, MD
Assistant Professor Associate Medical Director
Department of Pathology Blood Bank and Transfusion Service
University of Michigan Medical School University of Michigan Hospitals
rddvnprt at umich.edu
