CXCL12 and colorectal carcinoma: ,47 The Robo receptors have been shown to interact with a number of other membrane receptors, including Netrin receptor deleted in colorectal carcinoma (DCC)48 Sdf1 (Cxcl12) receptor Cxcr4,49 Neurexin IV,50 Neuropilin1,51 TgfbrII,52 Vegfr2,53,54 and Dscam.47