It is understood that some forms of the protein may have additional N terminal amino acids which may occur, for example, as a result of {HEAD ~ incomplete processing} or hydrolysis of {TAIL ~ the signal sequence} 
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It is understood that some forms of the protein may have additional N terminal amino acids which may occur , for example , as a result of { HEAD ~ incomplete processing } or hydrolysis of { TAIL ~ the signal sequence }
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 HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL