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Figure 1. Attachment of periodontal ligament cells, alveolar bone-derived cells, and gingival fibroblasts to protein(s) bound to an anti-CP column. Cementoblastoma-derived cells conditioned medium (500 mL) were used for CP purification. Attachment activity at different protein concentrations is shown. Silver-stained gel showed protein(s) from cementoblastoma-derived cells present in conditioned medium which bound to an anti-CP column. Arrow indicates CP migration. Periodontal ligament cells 
, alveolar bone-derived cells •, and gingival fibroblasts 
. Asterisk (*) indicates significant differences in cell attachment between periodontal ligament and alveolar bone-derived cells vs. gingival fibroblasts at P < 0.05.
