wherein Asn and His represent an asparagine residue and a histidine residue, respectively, and X represents a hydrogen atom or a sugar chain, and A and {HEAD ~ B} each represent independently a hydrogen atom or {TAIL ~ an amino acid residue} 
wherein Asn and His represent an asparagine residue and a histidine residue , respectively , and X represents a hydrogen atom or a sugar chain , and A and { HEAD ~ B } each represent independently a hydrogen atom or { TAIL ~ an amino acid residue }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL