prospero is expressed in neuronal precursors and encodes a nuclear protein that is involved in the control of axonal outgrowth in Drosophila.

Vaessin H, Grell E, Wolff E, Bier E, Jan LY, Jan YN. prospero is expressed in neuronal precursors and encodes a nuclear protein that is involved in the control of axonal outgrowth in Drosophila. Cell. 1991 Nov 29; 67(5):941-53.

1991
http://profiles.ucsf.edu/profile/317887
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Vaessin H, Grell E, Wolff E, Bier E, Jan LY, Jan YN