These portions of {TAIL ~ Toxins A} and {HEAD ~ B} may be fusion proteins with at least one non toxin protein sequence, and may also be soluble and substantially endotoxin free 
These portions of { TAIL ~ Toxins A } and { HEAD ~ B } may be fusion proteins with at least one non toxin protein sequence , and may also be soluble and substantially endotoxin free
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH