The PPIL1 protein is a spliceosome component that coordinates pre-mRNA splicing and controls RNA processing. As a peptidylprolyl cis-trans isomerase (PPIase), PPIL1 accelerates protein folding by catalyzing the cis-trans isomerization of proline imide peptide bonds. PPIL1 Protein, Human (His) is the recombinant human-derived PPIL1 protein, expressed by E. coli , with N-6*His labeled tag.