- The Dentin matrix protein 1 (Dmp1) is specifically expressed in mineralized, but not soft, tissues during development. Feng, J.Q., Huang, H., Lu, Y., Ye, L., Xie, Y., Tsutsui, T.W., Kunieda, T., Castranio, T., Scott, G., Bonewald, L.B., Mishina, Y. J. Dent. Res. (2003)