Splice factor regulating alternative splice site selection for certain mRNA precursors. Monomer. Component of the spliceosome (By similarity). Ubiquitously expressed. Uniformally expressed in the extraembryonic ectoderm at 5.5 dpc. Restricted to the distal part of the extraembryonic ectoderm at 6.5 dpc-7.5 dpc. 'Talia' means 'waistline' in Polish.