UASt regulatory sequences drive expression of the Cameleon(YC2.1) Ca[2+] sensor.
The excitatory junctional potentials at the larval neuromuscular junction in animals expressing Avic\GFPCameleon2.1.Scer\UAS under the control of Scer\GAL4Tab2-201Y show no obvious differences to wild type.
The product of this allele can be used as a fluorescent calcium sensor in the brains of live flies.