. "Any process that stops, prevents, or reduces the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of fractalkine, a chemokine involved in the control of the key regulatory mechanisms of cell trafficking at sites of inflammation." . . . "negative regulation of fractalkine biosynthetic process" . "down regulation of fractalkine biosynthetic process" . "down-regulation of fractalkine biosynthetic process" . "downregulation of fractalkine biosynthetic process" . "inhibition of fractalkine biosynthetic process" . "negative regulation of CX3CL1 biosynthesis" . "negative regulation of CX3CL1 biosynthetic process" . "negative regulation of fractalkine anabolism" . "negative regulation of fractalkine biosynthesis" . "negative regulation of fractalkine formation" . "negative regulation of fractalkine synthesis" . "negative regulation of neurotactin biosynthesis" . "negative regulation of neurotactin biosynthetic process" . .