Instead of having carboxylic acid like the majority of other amino acids, taurine features a "sulfonic acid" group.
ແທນທີ່ຈະມີອາຊິດ carboxylic ຄືກັບສ່ວນໃຫຍ່ຂອງອາຊິດ amino ອື່ນໆ, taurine ມີກຸ່ມ "ກົດ sulfonic."