** Shares of Applied Therapeutics APLT.O fall 70.3% to
$2.55 premarket
** The U.S. FDA on Wednesday declined to approve APLT's drug
to treat galactosemia, a rare genetic metabolic disease
** The FDA's letter cited "deficiencies in the clinical
application" for the drug, called govorestat, APLT says
** Brokerage William Blair says the letter was "unexpected
and disappointing" but believes it does not increase the
regulatory risk for govorestat's approval for SORD deficiency,
another rare genetic metabolic condition
** As of last close, stock has more than doubled YTD
(Reporting by Kamal Choudhury)
((Kamal.Choudhury@thomsonreuters.com;))