Human hemoglobin conjugated with two copies of 5-kDa PEG
  
    hb2 protein
  
  
    Organism: Homo sapiens
  
Monomeric molecular weight: 30.8 kDa
Oligomeric state:
  
      Dimer
  
  
      
        Total molecular weight: 61.6 kDa
      
  
The construct used for SAXS contains the alpha and beta globin chains conjugated with two copies of 5-kDa PEG