Observation:Prid:Pt:Tiss:Nom:Chloracetate esterase stain
observation:prid:pt:tiss:nom:chloracetate esterase stain
Observation:Prid:Pt:Tiss:Nom:Chloracetate esterase stain
observation:prid:pt:tiss:nom:chloracetate esterase stain