This category contains details for the recombination-based cloning steps used in the overall protein production process. It is assumed that these reactions will use commercially available kits. _pdbx_entity_src_gen_clone_recombination.clone_step_id in this category must point at a defined _pdbx_entity_src_gen_clone.step_id. The details in PDBX_ENTITY_SRC_GEN_CLONE_RECOMBINATION extend the details in PDBX_ENTITY_SRC_GEN_CLONE to cover recombination dependent cloning steps.