RNH1 and myelodysplastic syndrome: Additionally, the A3SS event between exons 2 and 3 of RNH1 detected in HUDEP-2 cells expressing SF3B1K700E was confirmed in both SF3B1WT- and SF3B1MUT-MDS patients, whereas the PSI of this event was relatively high in SF3B1MUT-MDS patients (See Supplementary Fig. S27 online).