How do eucaryotic ribosomes select initiation regions in messenger RNA?

Avian Sarcoma Viruses/metabolism Base Sequence Cells/metabolism Codon Eukaryotic Cells/metabolism Guanine Nucleotides/metabolism Models, Biological Mosaic Viruses/metabolism Nucleic Acid Conformation Peptide Chain Initiation, Translational Prokaryotic Cells/metabolism RNA, Messenger/metabolism RNA, Viral/metabolism Ribosomes/metabolism Structure-Activity Relationship

Codon Guanine Nucleotides RNA, Messenger RNA, Viral