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process for preparation of new polypeptides.in particular, the hénéicosapeptide formula tyrosyl seryl - - - - - - - - the seryl methionyl - glutaminyl the histidyl the arginyl phenylalanyl - the trypt
process for preparation of new polypeptides.in particular, the hénéicosapeptide formula tyrosyl seryl - - - - - - - - the seryl methionyl - glutaminyl the histidyl the arginyl phenylalanyl - the trypt