For example, general, well defined promoter sequences of {TAIL ~ chicken} β actin and C. elegans ribosomal genes have successfully directed {HEAD ~ expression} of GFP in hydra  
For example , general , well defined promoter sequences of { TAIL ~ chicken } β actin and C. elegans ribosomal genes have successfully directed { HEAD ~ expression } of GFP in hydra
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH