An RNA recognition motif (RRM) is required for the localization of PTB-associated splicing factor (PSF) to subnuclear speckles.


Using fusions with green fluorescent protein (GFP), we have identified sequences in the polypyrimidine tract binding protein-associated splicing factor (PSF) that are involved in nuclear and subnuclear localization. Like other splicing factors, PSF localizes to the nucleus, is absent from nucleoli, and accumulates in punctate structures within the nucleus… (More)


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