Serotonergic and corazonergic, but not dopaminergic, neurons modulate the light-induced changes in fruit fly larvae locomotion during the photophobic foraging stage and photoneutral wandering stage of development.

Aggressive behavior in Drosophila melanogaster is a complex trait and 57 genes influencing aggression levels have now been identified in a screen of fly lines carrying P-element insertions.

Analysis of the genome-wide distribution patterns of histone H3 lysine4 methylation in Arabidopsis thaliana seedlings shows that it has widespread roles in regulating gene expression.

Infection of different mammalian cell types by the intracellular pathogen Trypanosoma cruzi induces a range of host responses, involving cytokine-independent gene expression, a block in the cell cycle and impairment of cytokinesis.

Neurons governing sexual behavior migrate to the hypothalamus after birth, and experiments on immortalised cells of this type suggest this is regulated by the transcription factor AP-2alpha via direct upregulation of the Adhesion Related Kinase gene.