AN OBJECT OF THE PRESENT INVENTION IS TO PROVIDE A T CELL ADHESION MOLECULE THAT IS EXPRESSED ON A DENDRITIC CELL. ACCORDING TO THE PRESENT INVENTION, THERE IS PROVIDED A PROTEIN COMPRISING THE AMINO ACID SEQUENCE OF SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10 OR SEQ ID NO: 12. FIG.14