** Synlogic Inc's shares SYBX.O rise 29.8% to 73 cents in
premarket trading
** U.S. FDA grants orphan drug designation to Synlogic'
SYNB1934, an experimental therapy for phenylketonuria
** The orphan drug status is given to drugs that aim to
treat rare conditions and that are protected by government
incentives if approved and launched
** SYNB1934 has Rare Pediatric Disease Designation from the
FDA and orphan designation from European Medicines Agency (EMA)
** As of last close, SYBX's stock down 26.32% YTD
(Reporting by Pratik Jain in Bengaluru)
((Pratik.Jain@thomsonreuters.com;))