Extended Data Fig. 4: Representative densities for class I and class II E51-sCD4-BG505 complex structures.
From: Asymmetric opening of HIV-1 Env bound to CD4 and a coreceptor-mimicking antibody

a, Densities for residues involved in E51 CDRH3 sulfotyrosine interactions. b, Densities for fusion peptides in protomers A (top) and B (bottom). c, Densities for HR1C helices in protomers A (top) and B (bottom).