Deletion of sequences encoding snRNP-U1-70K amino acids 215-352 (the arginine-rich region).
snRNP-U1-70K::Hsap\SRSF1ΔRrich-HCterm is a suppressor of lethal phenotype of snRNP-U1-70K2/snRNP-U1-70KON35
snf148/Y ; snRNP70KON35/snRNP70K2 ; snRNP70K::Hsap\SFRS1ΔRrich-HCterm adults are never recovered.