dZMP + fumarate => (2S)-2-amino-2'-deoxyadenylo-succinate
dzmp + fumarate => (2s)-2-amino-2'-deoxyadenylo-succinate
dZMP + fumarate => (2S)-2-amino-2'-deoxyadenylo-succinate
dzmp + fumarate => (2s)-2-amino-2'-deoxyadenylo-succinate