The Drosophila gene RanBPM functions in the mushroom body to regulate larval behavior.

RanBPM function is required for larval feeding behavior Larvae homozygous for either the RanBPM k05201 or RanBPM s135 alleles, but not for the RanBPM ts7 allele, were smaller than yw control specimens at chronologically the same stage ( Figure S2 and data not shown) This size difference was apparent from the early third instar stage but not before.

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