3.5.4.5 6 11 - 209641, 209669 3.5.4.5 6.5 10.7 - 209648 3.5.4.5 3.5 10.5 deoxycytidine as substrate, beyond these values irreversible inactivation occurs 209661, 209665 3.5.4.5 3.8 7.5 - 209667 3.5.4.5 3 10.5 deoxycytidine as substrate, specific activity constant in this range, beyond these values irreversible inactivation occurs 209668