title: Effects of storage and repeated freezing and thawing on plasma cholinesterase activity.
abstract: Plasma cholinesterase activity, determined using either benzoyl choline or butyrylthiocholine as substrate, is stable for prolonged periods (greater than 12 months) when stored at -20 degrees C. Likewise, repeated freezing and thawing of plasma did not markedly affect cholinesterase activity.
mesh_terms: D001588:Benzoylcholine / Q000378:metabolism; D002092:Butyrylthiocholine / Q000378:metabolism; D002802:Cholinesterases / Q000097:blood*; D005615:Freezing; D006801:Humans; D013048:Specimen Handling
chemical_list: D001588:Benzoylcholine; D002092:Butyrylthiocholine; D002802:Cholinesterases