all of these except dha are used in the production of prostaglandins, localized tissue hormones that direct many processes in the cells. in addition, aa and dha play important roles in the function of the nervous system.29

Make this proper case.
All of these except DHA are used in the production of prostaglandins, localized tissue hormones that direct many processes in the cells. In addition, AA and DHA play important roles in the function of the nervous system.29