Animals, Base Sequence, Cell Line, Cloning, Molecular, Cytokines, Drosophila melanogaster, ELAV Proteins, Escherichia coli, Genes, fos, Genes, myc, Granulocyte-Macrophage Colony-Stimulating Factor, Humans, Molecular Sequence Data, Neurons, Oncogenes, Plasmids, Proto-Oncogene Proteins, RNA, Messenger, RNA-Binding Proteins, Recombinant Proteins, Repetitive Sequences, Nucleic Acid, Ribonucleoproteins, Sequence Homology, Nucleic Acid, Transcription, Genetic, Transfection