Rabadan-Diehl, C., Martínez, A., Volpi, S., Subburaju, S. and Aguilera, G.
Notes: The authors studied the rat VP V1b receptor (V1bR) gene including the 826 base 5´ UTR, which has five ORFs upstream (uORF) of the V1bR protein start codon, to examine the effect of the upstream peptides on V1bR translation. The V1bR gene was cloned into the pALTER®-MAX Vector, and substitution mutations were created in the uORF translation initiation codons with the Altered Sites® II in vitro Mutagenesis System. One microgram of the linearized pALTER®- V1bR construct was transcribed using the Riboprobe® System and translated using Wheat Germ Extract with or without 35S-methionine. The unlabeled protein was analyzed by Western blot. The radiolabeled protein was spun through a 3% sucrose cushion, precipitated and separated by SDS-PAGE. For a possible membrane-targeted protein, the uORF1 was transcribed in vitro and then translated using Rabbit Reticulocyte Lysate, Canine Pancreatic Microsomal Membanes and 35S-methionine. The proteins were spun through a 3% sucrose cushion and then run on a 15% SDS-PAGE gel to determine membrane presence. (3749)