To generate a full - length unc - 9:: gfp construct, the 14.7 - kb UNC - 9A + B PCR product (representing the 5» end of unc - 9) and the unc - 9:: gfp plasmid were digested separately with Kpn I, digests electrophoresed through low -
melt agarose (SeaPlaque GTG agarose, FMC, Rockland, ME, USA), and appropriate fragments purified by phenol extraction and ethanol precipitation.