 LEXINGTON, Mass.--BUSINESS WIRE--Cyteir Therapeutics, Inc. Cyteir Nasdaq: CYT, a company focused on the discovery and development of next-generation synthetically lethal therapies for cancer was added as a member of the U.S. small-cap Russell 2000 Index, effective after the US market opens on September 20, as part of the 2021 Russell indexes reconstitution. Membership in the Russell 2000 Index, which remains in place for one year, is based on membership in the broad-market Russell 300 