This book provides numerous methods for identification, validation, and functional characterization of chimeric RNAs, herein described as any transcript which contains the nucleotide sequence of two distinct parental genes. Beginning with identification and characterization through bioinformatics tools, the book continues with experimental validation using RT-PCR, hybridization methods for RNA, and the use of mass spectrometry data for fusion protein validation, as well as functional and mechanistic studies of chimeric RNAs and translational applications. Written for the highly successful Methods in Molecular Biology series, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls.