I am trying to compare protein distribution in different brain tissues. The proteins will be extracted from tissue samples obtained from human brains embalmed with formaldehyde/glutaralldehyde mixture. I found a couple of published protocols that have been used to reverse formaldehyde crosslinking by heating tissue samples at 70oC for 30-45 min prior to protein extraction, but I did not find any protocols for reversal crosslinking with glutaraldehyde.