Genes: J To use the sharing features on this page, please enable JavaScript. Explore the normal functions of human genes and the health implications of genetic changes. Other genes A-Z Expand Section A B C D E F G H I J K L M N O P Q R S T U V W X Y Z JAG1: jagged canonical Notch ligand 1 JAK2: Janus kinase 2 JAK3: Janus kinase 3 JPH3: junctophilin 3 JUP: junction plakoglobin