fractalkine|D8Bwg0439e|neurotactin|CX3C|Scyd1 + D8Bwg0439e Scyd1 Cx3cl1 protein coding gene genetic mapping Gene http://identifiers.org/mgd/MGI:1097153 fractalkine neurotactin CX3C O chemokine (C-X3-C motif) ligand 1 MGI:1097153