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