3.2.2.20	enzyme in unliganded form and in a ternary product complex with abasic DNA and 3-methyladenine. The abasic DNA is not flipped into the enzyme's active site, instead conformational relaxation must occur in the DNA upon base hydrolysis	
3.2.2.20	structure resembling a catalytic intermediate complex. AlkC uses unique HEAT-like repeat folds and immunoglobulin-like domains to induce a sharp kink in the DNA, exposing the damaged nucleobase to active site residues that project into the DNA. The active site can accommodate and excise N3-methylcytosine and N1-methyladenine	
3.2.2.20	wild type and mutant enzyme Y16F in complex with 3-methyladenine, sitting drop vapor diffusion method, using 0.1 M Tris-HCl pH 8.5, 1.8 M ammonium sulfate, 0.2 M Li2SO4