Spherule wall formation by Physarum polycephalum.
D002473:Cell Wall / Q000648:ultrastructure; D006025:Glycosaminoglycans; D009235:Myxomycetes / Q000254:growth & development*; D010804:Physarum / Q000254:growth & development* / Q000378:metabolism; D012430:Ruthenium Red
D006025:Glycosaminoglycans; D012430:Ruthenium Red