title: Putrescine and spermidine in the cyst coat of the protozoan Colpoda steinii [proceedings].
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000032:analysis*; D016798:Ciliophora / Q000032:analysis* / Q000502:physiology; D011700:Putrescine / Q000032:analysis*; D013095:Spermidine / Q000032:analysis*
chemical_list: D013095:Spermidine; D011700:Putrescine