>sp|Q31ZS8|KITH_SHIBS Thymidine kinase OS=Shigella boydii serotype 4 GN=tdk MAQLYFYYSAMNAGKSTALLQSSYNYQERGMRTVVYTAEIDDRFGAGKVSSRIGLSSPAK LFNQNSSLFDEIRAEHEQQAIHCVLVDECQFLTRQQVYELSEVVDQLDIPVLCYGLRTDF RGELFIGSQYLLAWSDKLVELKTICFCGRKASMVLRLDQAGRPYNEGEQVVIGGNERYVS VCRKHYKEALQVGSLTAIQERHRHD