The authors reply

Butler WT , Bhown M. , DiMuzio MT , Linde A. (1981). Noncollagenous proteins of dentin. Isolation and partial characterization of rat dentin proteins and proteoglycans using a three-step preparative method. Coll Res 1:187-199.

Butler WT , Bhown M. , DiMuzio MT , Cothran WC , Linde A. (1983). Multiple forms of rat dentin proteins. Arch Biochem Biophys 225:178-186.

DiMuzio MT , Veis A. ( 1978a). The biosynthesis of phosphophoryns and dentin collagen in the continuously erupting rat icisor. J Biol Chem 253:6845-6852.

DiMuzio MT , Veis A. ( 1978b). Phosphophoryns-major noncollagenous proteins of the rat incisor dentin. Calcif Tissue Res 25:169-178.

Feng JQ , Luan X. , Wallace J. , Oshima T. , Kulkarni AB , D'Souza RN , et al. (1998). Genomic organization, chromosomal mapping and promoter analysis of mouse dentin sialophosphoprotein (DSPP) gene, which encodes for both dentin sialoprotein and dentin phosphoprotein. J Biol Chem 273:835-842.

George A. , Sabsay B. , Simonian Pal , Veis A. ( 1993). Characterization of a novel dentin matrix acidic potein. Implications for biomineralization. J Biol Chem 268:12624-12630.

George A. , Bannon L. , Sabsay B. , Dillon JW , Malone J. , Veis A. , et al. (1996). The carboxyl terminal domain of phosphophoryn contains unique extended triplet amino acid repeat sequences forming ordered carboxyl-phosphate interaction edges which may be essential in the biomineralization process. J Biol Chem 271:32869-32873.

George A. , Srinivasan R. , Thotakura S. , Veis A. ( 1998). The phosphophoryn gene family: identical domain structures at the carboxyl end. Eur J Oral Sci 106(Suppl 1):221-226.

George A. , Srinivasan R. , Thotakura S. , Liu K. , Veis A. ( 1999). Rat dentin matrix protein 3 (DMP3) is a compound protein of rat dentin sialoprotein (DSP) and phosphophoryn (PP). Connect Tissue Res 40:49-57.

Kulkarni GV , Jee S-W. , Srinivasan R. , Marks S. Jr , Veis A. , George A. (2000). Differential expression of dentin matrix protein 1, 2 and 3 transcripts in early stages of tooth development. In: Proceedings, 6th International Conference on the Chemistry & Biology of Mineralized Tissues, Vittel, France. Goldberg M, Robinson C, Boskey A, editors. Rosemont, IL: American Academy of Orthopaedic Surgeons, pp. 161-165.

MacDougall M. , Simmons D. , Luan X. , Nydegger J. , Feng J. , Gu TT (1997). Dentin phosphoprotein and dentin sialoprotein are cleavage proteins expressed from a single transcript coded by a gene on human chromosome 4. Dentin phosphoprotein DNA sequence determination. J Biol Chem 272:835-842.

Rahima M. , Veis A. ( 1988). Two classes of dentin phosphophoryn from a wide range of species contain immunologically cross-reactive epitope regions. Calcif Tissue Int 42:104-112.

Ritchie HH , Wang LH ( 1997). A mammalian bicistronic transcript encoding two dentin-specific proteins. Biochem Biophys Res Commun 231:425-428.

Ritchie H. , Hou H. , Veis A. , Butler WT (1994). Cloning and sequence determination of rat dentin sialoprotein (DSP), a novel dentin protein. J Biol Chem 269:3698-3702.

Takagi Y. , Veis A. ( 1981). Matrix protein differences between normal and dentinogenesis imperfecta dentin. In: Chemistry and biology of mineralized connective tissues. Veis A , editor. New York: Elsevier North Holland , pp. 233-243.

Takagi Y. , Veis A. ( 1984). Isolation of phosphophoryn from human organic matrix . Calcif Tissue Int 36:259-265.

Takagi Y. , Veis A. , Sauk J. ( 1983). Relation of mineralization defects in collagen matrices to non-collagenous protein components. Clin Orthop Rel Res 175:283-290.

Veis A. , Sabsay B. (1982). Bone and tooth formation. Insights into mineralization strategies. In: Biomineralization and biological metal accumulation . Westbroek P , deJong EW , editors. Dordrecht, Holland: D. Reidel Pub. Co., pp. 273-284.