scirpy.io.AirrCell.VALID_LOCI

AirrCell.VALID_LOCI = ('TRA', 'TRG', 'IGK', 'IGL', 'TRB', 'TRD', 'IGH')

Valid chains are IMGT locus names see https://docs.airr-community.org/en/latest/datarep/rearrangements.html#locus-names