. . . . . . "Asserts the amino-acid substitution notation, referenced to the 195-residue Spike Receptor Binding Domain (RBD; UniProt P0DTC2 positions 331–525), that identifies the defining mutation of this variant in the MAC StayAhead RBD-focused pipelines. Differs from `mac:hasGISAIDSeqId` only in the residue numbering reference frame." . . "has MAC seq_id (RBD mutation notation)" . . "2026-05-22"^^ . . . . "Vocabulary term: mac:hasMACSeqId (draft, unsigned)" . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQD3w/IUb755GIzp3ueODYkgELhyq4Clygb5Kspge50xo+n8uC/IvXwi+ukRjEpdfX/JZ09yKUCJ2AMMr/QchrsP1Xhg9Q3fEZ4E12XqFd5jX00Qs0K5XZwjBaV8NdDTJW9I4gpcyh0cry7hSBAWHkXEkqbK+lQvR4UFAKejFq6u/wIDAQAB" . "qq/6etJ+p4eEw8OEIcI4R1zojI471pT2P2Hkm/t1nbF1yFUJq/Yn/oI+zr8LCn9PRj3oOLjFF6/l/QxpLIw7A+d8nqwQkvCY0c3Of5I8yZ3Sji5tVuKbJpUnGAXMEqCjmBpt25kcmh9BXIzsLE/RBVKKnCcSD9StlVg1S/EXTlw=" . . .