Ameloblastin (AMBN, also known as amelin or sheathlin), which is distributed in enamel rod sheath, is one of the most important non-amelogenins and can be also regarded as tooth-specific protein.

• 成釉蛋白(ameloblastin，AMBN/sheathlin/amelin)，又称鞘蛋白(sheath proteins)，是釉质基质中含量最多的非釉原蛋白，是釉质基质蛋白的重要组份，主要分布在牙釉质的釉柱鞘中，被认为是牙齿特异性蛋白。