Figure 5.
Competitive ELISA with VHH and known mAbs on optC and ZM197M SOSIPs. On optC (upper part), CD4bs ligands compete with VHH-9, VHH-23, VHH-43, A6, less with VHH-28 and VHH-1; on ZM197M (lower part), CD4bs ligands compete with A6, VHH-43, VHH-5, VHH-23, less/not with VHH-1, VHH-28, VHH-33. Detection of competition also depends on strength of VHH binding to the respective SOSIP (see Supplementary Figure S5: VHH-9 does not bind ZM197M −> no competition detectable). Stars indicate competition, see also legend to Supplementary Table S2.