In addition to its unique phenotype, PHE885 secretes up to 25 fold more target specific IL-2 and ~7 fold more IFN gamma in vitro , when comparing to the TM products either using the same lentiviral vector (TM_PHE885) or a clinically validated anti-BCMA vector (MCM998) . Based on these results, a Phase 1, open-label trial assessing PHE885 in patients with r/r MM (NCT04318327) was initiated. Initial data from the dose escalation portion of the Phase 1 study will be presented separately.