SARS-CoV-2 Spike RBD variant Epsilon, carrying the L120R substitution (corresponding to L452R in the full Spike numbering — Epsilon's canonical defining mutation). Pango lineage B.1.427 + B.1.429 (composite). RBD anchor FDO for the MAC FAIR Digital Twin observation cluster — all Type 2-8 observation FDOs of this variant link back here via mac:isObservationOf.