The function of SRGAP2B (SLIT-ROBO Rho GTPase activating protein 2B, ENSG00000196369) is as follows. May regulate cell migration and differentiation through interaction with and inhibition of SRGAP2 (PubMed:31822692). In contrast to SRGAP2C, it is not able to induce long-lasting changes in synaptic density throughout adulthood (PubMed:31822692). {ECO:0000269|PubMed:31822692, ECO:0000305|PubMed:22559944, ECO:0000305|PubMed:31822692}.