Introduction Mesquite in dense thickets reduce grass production and make livestock management more difficult. To compound the problem, treatments which top-kill mesquite, such as chaining, shredding, high-intensity fires, or herbicides such as 2,4,5T or triclopyr (Remedy), stimulate regrowth from stem bases and increase stem number per plant and per land area (Fisher et al. 1959). An alternativ...

Protein kinase C has long been thought to mediate DAG signaling at the synapse. Recently PKC has been supplanted by members of the Unc13 family as the predominant effectors of DAG signaling. Thanks to a study by Wierda and colleagues in this issue of Neuron, PKC returns to reclaim part of the kingdom: both pathways must be active to activate presynaptic potentiation.

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