>sp|Q914K9|Y021_SIFVH Uncharacterized protein 21 OS=Sulfolobus islandicus filamentous virus (isolate Iceland/Hveragerdi) OX=654908 GN=SIFV0021 PE=4 SV=1 MVILNKYYSMKEEYEILNIEIKDDNLFVSVKLIRNGSVEIFNYVPIQNIPKIIKNFSLVT QKNLMDN