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Hsf1p and Msn2/4p cooperate in the expression of Saccharomyces cerevisiae genes HSP26 and HSP104 in a gene‐ and stress type‐dependent manner

Saccharomyces cerevisiae possesses several transcription factors involved in the transcriptional activation of stress‐induced genes. Among them, the heat shock factor (Hsf1p) and the zinc finger proteins of the general stress response (Msn2p and Msn4p) have been shown to play a major role in stress protection. Some heat shock protein (HSP) genes contain both heat shock elements (HSEs) and stress response elements (STREs), suggesting the involvement of both transcription factors in their regulation. Analysis of the stress‐induced expression of two of these genes, HSP26 and HSP104, reveals that the contribution of Hsf1p and Msn2/4p is different depending on the gene and the stress condition.