FIG. 3.

Phenotype of an alpA deletion strain. (A) In comparison to a control strain (top, RMS011), the ΔalpA strain (bottom, SDV83b) grew slower and colonies were more compact. While wild-type hyphae grew straight (B), hyphae of the alpA deletion strain showed a curved growth phenotype (C). (D) In a strain having the only functional copy of alpA under the control of the inducible alcA promoter (SCE05), curved growth was observed under repressing conditions (glucose), but wild-type hyphal morphology was restored when grown under inducing conditions (ethanol) (E).