Korro Bio Inc.’s latest update on RNA editing prospect KRRO-110 may mean one less competitor in alpha-1 antitrypsin deficiency (AATD), and shares of the firm (NASDAQ:KRRO) closed Nov. 13 at $6.50, down $24.92, or 79%. As part of the third-quarter earnings report, Korro said KRRO-110 produced functional protein in AATD patients but fell short of projected levels of functional protein after a single administration.