“…The tcsB deletion strain, however, did not exhibit a detectable phenotype for either hyphal development or morphology on standard or stress media, suggesting that A. nidulans has a more complex and robust osmoregulatory system than S. cerevisiae. 15) On the other hand, based on the analogy with S. pombe, 20,21) PhkA, the homolog of Phk1/2, and PhkB, the homolog of Phk3, are candidate sensors for the hydroxyl peroxide signal. We have constructed deletion mutants of these genes.…”