Is collagen present in unicellular organisms?
D000596:Amino Acids / Q000032:analysis; D003094:Collagen / Q000032:analysis*; D009235:Myxomycetes / Q000032:analysis* / Q000254:growth & development; D011506:Proteins / Q000032:analysis; D013768:Tetrahymena / Q000032:analysis* / Q000254:growth & development
D000596:Amino Acids; D011506:Proteins; D003094:Collagen