IGLL5 and COVID-19: Paired public antibody clonotypes were defined based on their shared VH and JH germline segments, the same VK/VL and JK/JL, and the highly similar CDRH3 amino acid sequences with 80% or greater amino acid identity.41 We clustered clonotypes on the samples, which shared identical IGHV-J gene and IGLV-J from all donors simultaneously (CD-HIT Methods).42Paired public antibody clonotypes were found among convalescent COVID-19 patients.