>3p46_A mol:protein length:20 Synthetic collagen peptide XGPPGPPGLPGEAGPPGPPX >3p46_B mol:protein length:20 Synthetic collagen peptide XGPPGPPGLPGEAGPPGPPX >3p46_C mol:protein length:20 Synthetic collagen peptide XGPPGPPGLPGEAGPPGPPX