>sp|Q58339|PUR8_METJA Adenylosuccinate lyase OS=Methanocaldococcus jannaschii GN=purB MELNQIIKSGEKMAVHPIDYRYGTPEMRKVWEEENKLEKMLKVEAALAKAQAELGLIPKE AAEEINKKASTKYVKLERVKEIEKQTKHDVVAMIRALAEVCEGNAGEYIHFGATSNDIVD TANSLLIKESIEIIEDKLKQLRDILLDKAEEHKYTVCVGRTHGQHAIPTTYGMRFALWAA EIDRHLERLKEAKKRICVSMITGAVGTMAAMGEKGLEVHKRVAEILGLEPVLISNQVIQR DRHAEFVFLLALIAQTLNKIGVTVRSMQRTEIGELEEEFDPTKQTGSSTMPHKRNPITFE QICGLSRVIKSLCIAEMDNIPLWEERDLTNSSAERCIFAEVCVLTDHILTLAIKGVKKLK VNKENVERNLELTKGLIMAERIMIELAKRGMGRQTAHEIVRQCAMKAYEEKRHLKDILLE NEEVMKYITKEELEELMNPKTYIGLAPQIVDEVIKTLKNKKY