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