>sp|Q8ZV53|KITH_PYRAE Thymidine kinase OS=Pyrobaculum aerophilum GN=tdk MLVVIVGPMFAGKTTELIRRVERYVIAGRRAIVFKPSLDVRYDASKVAAHNGLKFDAFVI PPDKDGVEIIRKMGAEYDVVAVDEIQFFPVDLADALNQLANGRIVIAAGLNLDFRGEPFE TTARAMAFADRVISLSAVCKLCGKPATRTQRLINGVPAPRHSPRILIGGNESYEARCRRH YVIPP