Cagan Lab - Protocols










Cagan Lab - Protocols
EM fixation:
1.dissect in PBS
2.fix in PLP for 30’
3.Wash 3X10’ in PBS
4.fix 30’ in 2% glutataraldehyde (from freezer) in PBS
5.wash 3X 10’ in PBS
post-fix in OsO4/K3Fe(CN)6 for 60’
add equal volumes of OsO4 and K3Fe(CN)6 from tubes in freezer container marked “Microscopy”.
6.Wash 3X10’ in PBS
7.Dehydrate in EtOH series: 30%, 50%,70%,80%,95%, and 3X100%
!!!!!!!!!No cheating!!!!!!!!!!!!!! This is critical for EM!!!!!!!
8.3X10’ in propylene oxide
9.overnight in 1:1 propylene oxide:EM resin
use gloves
10.5 hrs in 100% resin; imbed
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