In {HEAD ~ some embodiments}, {TAIL ~ Ephexin5} comprises at least one peptide bond replacement 
In { HEAD ~ some embodiments } , { TAIL ~ Ephexin5 } comprises at least one peptide bond replacement
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH