Immunogen sequence: IPVPQSKPLE RHVEKSMNLH LLARSNVSVQ DELNASGTIK ESGVLVHEGD RGRQENTQDG HKGEGNGSKW AEVGGKSFST YSTLANEEGN IEGWNGDTGK AETYGHDGIH GKEENITANG IQGQVSIIDN A. This gene encodes two principal proteins of the dentin extracellular matrix of the tooth