Scientists in Memphis are in a race against time to build a broader base for identifying coronavirus mutations, starting with U.K. strain B117, which has locked down the United Kingdom.As of Friday, Jan. 8, 50 cases had been reported in the United States, including a possible case in Chattanooga. Identifying the mutation requires “fingerprinting” or sequencing its DNA, a laborious task the University of Tennessee Health Science Center is performing now in its regional biocontainment lab run by Colleen Jonsson.