Snake (Ptyas mucosa) brains (400 g) were extracted with a mixture of acetone, water, and hydrochloric acid. The precipitate (5.6 g) that formed upon addition of five volumes of acetone to the extract, designated acid-acetone powder, was subjected to gel filtration on Sephadex G-25. A large unretarded peak (SB-1) with molecular weight greater than 5000 and a… (More)
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