Despite its name, MP2 is not a midline precursor in the conventional sense---it is neuroblast derived from the neurectoderm. It generates two intersegmental interneurons that bifurcate and send axons in the anterior and psoterior directions and by stage 17, span the entire length of the CNS. Thus MP2 and NB 2-5 are the only two neuroblasts in the Drosophila embryonic CNS that generate interneurons that span the entire ventral nerve cord.
Wherever possible we show movies with 2 or more clones, in order to show how the clones are arranged in relation to one another.
All clones are at stage 17, unless otherwise specified.