https://www.ncbi.nlm.nih.gov/Structure/pdb/6Y5H
X-31 Influenza Haemagglutinin HA1X-31 Influenza Haemagglutinin HA22-acetamido-2-deoxy-beta-D-glucopyranosealpha-D-mannopyranosebeta-D-mannopyranose
ectodomainxhaemagglutininphstate
https://pubmed.ncbi.nlm.nih.gov/19226163/
The conserved membrane-proximal external region (MPER) of the HIV-1 gp41 envelope protein is the established target for very rare but broadly neutralizing...
the hivstructuremembraneproximalectodomain