Abstract
<p>Tannase is industrially important enzyme used in the production of gallic acid. Gallic acid possesses wide range of biological activities such as`antioxidant, antibacterial, and antivirus. This work aims to produce gallic acid from local fruit rind in Lombok enzimatically. The tested rind local fruit were juwet (<em>Syzygium cumini</em>), kepundung (<em>Baccaurea racemosa</em> Muell.Arg) and mangosteen (<em>Garcinia mangostana</em>). The result showed that tannase activity of 57.827 U/mg. Gallic acid concentration has increased with increase in amount of tannase and reaction time. Optimal gallic acid concentration was obtained at 1 % (v/v) tannase and 60 minutes of reaction time for kepundung rind. However, juwet and mangosteen rind produced optimal gallic acid at 1.2 % (v/v) tannase with the same of reaction time.</p>
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