Elpiscience Biopharma Ltd.’s ES-005 is a new high-affinity monoclonal antibody (MAb) that blocks human lymphocyte-activated gene 3 (LAG3) from binding to several ligands, such as major histocompatibility complex class II (MHC-II), liver and lymph node sinusoidal endothelial cell C-type lectin (L SECtin) and fibrinogen like 1 (FGL1).