LMX1B
LIM homeobox transcription factor 1-beta, also known as LMX1B, is a protein which in humans is encoded by the LMX1B gene.

Function 

LMX1B is a LIM homeobox transcription factor which plays a central role in dorso-ventral patterning of the vertebrate limb.

Clinical significance 

Mutations in the LMX1B gene are associated with the Nail-patella syndrome.