Figure 5E. Copyright: Reprinted with permission from Elsevier from [doi:10.1006/dbio.1999.9371] Dev Biol 212: 290-306, Yuan W; Zhou L; Chen JH; Wu JY; Rao Y; Ornitz DM, "The mouse SLIT family: secreted ligands for ROBO expressed in patterns that suggest a role in morphogenesis and axon guidance." Copyright 1999 [PMID:10433822]