<prompt> Following are the mature mineralized matrix marker of the periodontal ligament except:Type 1 and type 3 collagen.Osteonectin.Alkaline phosphate.Osteopontin.  <response>: Markers for Periodontal Ligament Stem Cells1. Bone Marrow MarkersSTRO-12. Perivascular Cell MarkersCD146αSMAPericyte associated antigen 3G5CD1063. Mature Mineralized Matrix MarkersAlkaline phosphataseOsteonectinOsteopontinOsteocalcinBone sialoproteins4. Connective Tissue Protein MarkersType I and III collagen 