3.1.3.75 phosphoethanolamine/phosphocholine phosphatase ameloblast presence in the enamel layer, ameloblast Tomes' processes, and in the walls of ameloblast secretory vesicles 750663 3.4.21.109 matriptase ameloblast - 683489 3.4.22.52 calpain-1 ameloblast - 707296 3.4.22.60 caspase-7 ameloblast - 731701 3.4.24.B6 matrix metalloproteinase-20 ameloblast - 684397, 686541, 686542, 710860, 712555, 712590, 719262 3.4.24.B6 matrix metalloproteinase-20 ameloblast detectable only in ameloblasts and odontoblasts of developing teeth 693376 3.4.24.B6 matrix metalloproteinase-20 ameloblast expressed exclusively in ameloblasts and odontoblasts 692512 3.4.24.B6 matrix metalloproteinase-20 ameloblast MMP-20 is secreted along with enamel proteins by secretory stage ameloblasts into the enamel matrix of developing teeth 691154 3.4.24.B6 matrix metalloproteinase-20 ameloblast secretion 651185