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Expression of the ETS transcription factor ER81 in the developing chick and mouse hindbrain

ER81 is an ETS domain‐containing transcription factor, which is expressed in various developing tissues and organs of the embryo and in pools of developing spinal motor neurons and proprioceptive sensory neurons. Analysis of mice lacking ER81 function showed that this gene played an important role in the establishment of sensory‐motor circuitry in the spinal cord. Here, we investigate the expression pattern of er81 in the hindbrain of both chick and mouse embryos. We find that er81 is expressed in a subpopulation of inferior olive neurons, which send their projections to the caudal cerebellum. © 2002 Wiley‐Liss, Inc.