>sp|P07736|RNU1_USTSP Guanyl-specific ribonuclease U1 OS=Ustilago sphaerogena OX=5271 PE=1 SV=2 QGGVSVNCGGTYYSSTQVNRAINNAKSGQYSSTGYPHTYNNYEGFDFSDYCDGPYKEYPL KTSSSGYTGGSPGADRVVYDSNDGTFCGAITHTGASGNNFVQCSY