LXR can refer to one of the following: ...
Orphan nuclear receptor expressed in liver, intestine and adrenal gland, that can complex with retinoid-X receptor (RXR). Ligand may be oxysterol metabolites of cholesterol (particularly 22(R)-hydroxycholesterol) and thus LXR may regulate cholesterol biosynthesis.
a cross-reference tool that can be used to navigate the Linux kernel source code, available at lxr.linux.no.