{TAIL ~ Examples} of {HEAD ~ conservative substitutions} with non conventional amino acids are described in Rosenberg et al 
{ TAIL ~ Examples } of { HEAD ~ conservative substitutions } with non conventional amino acids are described in Rosenberg et al
TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH