Under these conditions cells extend neurites, develop electrical excitability and express {HEAD ~ genes} encoding {TAIL ~ neuronal cell specific proteins}  
encoding
Under these conditions cells extend neurites , develop electrical excitability and express { HEAD ~ genes } encoding { TAIL ~ neuronal cell specific proteins }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH