Expression in yeast of a fusion gene composed of the promoter of a heat-shock gene from Arabidopsis and a bacterial gene for beta-glucuronidase.

Production of a functional beta-glucuronidase (GUS) protein was induced by exposure of exponentially growing yeast cells to heat shock after transformation of the GUS gene under the control of the promoter of the heat-shock gene, HSP18.2, from Arabidopsis. Yeast cyr and bcy mutations appeared to have essentially no effect.