All of the following are features or functions of nanobodies
     All of the following are features or functions of nanobodies except ______________.  small, monomeric, lack disulfide bonds, and resistance to denaturation  high affinity to the antigen  recognize protruding and recessed paratopes  cannot be humanized  consist of only the VHH domain of heavy chain antibodies 
  
  Solution
d)cannot be humanized
because we have many humanized antibodies that are available .example-CyaA-Hly specific humanized antibody

