Affiliation: | 1. Institute of Physiology, Czechoslovak Academy of Sciences, Videnska 1083, 142 20, Prague 4, Czechoslovakia 2. Centre for Study of Histochemistry, C.N.R., Piazza Botta 10, Pavia, Italy 3. Department of Animal Biology, University of Pavia, Italy 4. Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, Prague, Czechoslovakia
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