Drosophila Proteins; Dystrophin/chemistry; Insect Proteins/chemistry; Membrane Transport Proteins; Muscle Proteins/chemistry; Muscle Proteins/metabolism; Nerve Tissue Proteins/chemistry; Nerve Tissue Proteins/metabolism; Neuromuscular Junction/metabolism; Nuclear Envelope/chemistry; Nuclear Proteins/chemistry; Nuclear Proteins/metabolism; Receptors, Cholinergic; Alternative Splicing/genetics; Amino Acid Sequence; Animals; Cell Line; Cytoskeletal Proteins; Fluorescent Antibody Technique; Gene Expression Profiling; Humans; Mice; Microfilament Proteins; Molecular Sequence Data; Muscle Fibers, Skeletal/cytology; Muscle Fibers, Skeletal/metabolism; Muscle Proteins/genetics; Nerve Tissue Proteins/genetics; Neuromuscular Junction/chemistry; Neuromuscular Junction/cytology; Nuclear Proteins/genetics; Precipitin Tests; Protein Binding; Protein Isoforms/chemistry; Protein Isoforms/genetics; Protein Isoforms/metabolism; RNA, Messenger/genetics; RNA, Messenger/metabolism; Receptor Protein-Tyrosine Kinases/chemistry; Receptor Protein-Tyrosine Kinases/genetics; Receptor Protein-Tyrosine Kinases/metabolism; Sequence Alignment; Two-Hybrid System Techniques