Q. How many subunits are there in one molecule of LADH? and How many Zinc ions are there in each subunit?

Q. How many subunits are there in one molecule of LADH? and How many Zinc ions are there in each subunit? Draw out the complete coordination environment of each zinc ion, including all ligands and nearby co-factors, complete protein side chains and hydrogens. Be careful how you draw the double bonds and place the hydrogens in the rings of the histidine ligands.