Cd- and Zn-NagA had been made use of to handle the incidence of direct interactions in the carbonyl oxygen/sulfur and the steel ion by way of a comparison on the kinetic constants for NPhaya Nak or Phaya N?ga (Thai: ??????; RTGS: phaya nak; lit.?'lord of N?ga', phaya derived from Mon which signify higher nobility) or Nakkharat (Thai: ??????; lit.?