Hyaluronicacid(HA)isanacidiclinearmucopolysacchari,havingregularlyalternating unitsofN‐acetylglucosamineandD‐glucuronicacidlinkedby1,4‐or1,3‐β‐glycosidicbonds ﹒ HA distributeswidelyinconnectivetis,vitreousbody。Andjointfluidofvertebrates ﹒ Itsrelative mole ......