https://www.rcsb.org/structure/6NQ5
human (alpha met/beta hemichrome) hemoglobin with S-nitrosation at beta-Cys93
rcsb pdbhumanalphametbeta
https://www.rcsb.org/structure/6KAE
Crosslinked alpha(Fe-CO)-beta(Ni) human hemoglobin A in the T quaternary structure at 95 K: Light
rcsb pdbcrosslinkedalphafeco