title: Knockin approaches.
mesh_terms: D000818:Animals; D018390:Gene Targeting / Q000379:methods*; D017930:Genes, Reporter / Q000235:genetics*; D005818:Genetic Engineering / Q000379:methods*; D005822:Genetic Vectors / Q000235:genetics; D019426:Integrases / Q000378:metabolism; D051379:Mice; D016254:Mutagenesis, Insertional; D011995:Recombination, Genetic; D019076:Transgenes / Q000235:genetics*; D014764:Viral Proteins / Q000378:metabolism
chemical_list: D014764:Viral Proteins; C045073:Cre recombinase; D019426:Integrases