genetic model nonhuman 8 priority journal 6 Article 4 Humans 4 animal experiment 4 enzyme activity 4 exon 4 human 4 mouse 4 5 aminolevulinate synthase 2 5-Aminolevulinic acid 2 Animals 2 Brain 2 Bufonidae 2 Chorionic Gonadotropin 2 Chromatin 2 DNA library 2 Exons 2 Female 2 Follicle Stimulating Hormone 2 Gonadotropins, Pituitary 2 Heme metabolism 2 Introns 2 Luteinizing Hormone 2 Male 2 Mice 2 Mice, Transgenic 2 Models, Animal 2 Mus musculus 2