SilkFibroinsCollagenCollagen Type IFibrillar CollagensCollagen Type IVCollagen Type IIIReceptors, CollagenCollagen Type IICollagen Type VICollagen Type VCollagen DiseasesExtracellular MatrixProcollagenCollagen Type XVIIIHydroxyprolineCollagen Type XIFibroblastsHydroxylysineCartilageGelsCells, CulturedFibril-Associated CollagensBasement MembraneCollagen Type XExtracellular Matrix ProteinsSkinTendonsCollagen Type XIIMicrobial CollagenaseCollagen Type VIIFibronectinsPepsin AConnective TissueProteoglycansCollagenasesFibrosisCartilage, Articular