Targeting trajectory for the loop movement in dogfish M4 lactate dehydrogenase. The open loop 95–115 from the apo structure (PDB code 6LDH) has been targeted to its closed ternary complex structure (PDB code 1LDM), keeping residues 95 and 115 fixed. Targeting was performed on all ϕ,ψ angles between and inclusive, and targets were achieved. (a) The starting open loop structure is in blue, the target closed loop structure in red, and the resulting final structure from the targeting process in green with a thick stick depiction. The structures depicted in green with thin sticks are intervening structures generated during the targeting process. (b) View of the tip of the loop (residues 102 and 103).