Chen, Jinglong; Olsen, Jane; Ford, Sally; Mirza, Shamaruh; Walker, Andrew; Murphy, James M; Young, Ian
Interleukin-3 (IL-3) promotes both self-renewal and differentiation of early multipotential progenitors and is involved in inducible hematopoiesis in response to infections. Here we report new insights into these processes with the identification of a new isoform (SP2) of IL-3 receptor α (IL-3Rα), present in mouse and human hematopoietic cells, which lacks domain 1 of the full-length receptor (SP1). Binding assays with βIL-3 mutants showed that mouse SP2 uses a different high affinity binding...[Show more]
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