>sp|P27079|VXIS_BPP21 Excisionase OS=Enterobacteria phage P21 OX=10711 GN=xis PE=4 SV=1
MSRLITLQDWAKEEFGDLAPSERVLKKYAQGKMMAPPAIKVGRYWMIDRNSRFVGTLAEP
QLPINANPKLQRIIADGC