ABF2, SAPK2, SAPK7, SAPK8, SAPK10, ABI1, HAB1, PP2C06, SRK2E, and PYL3 were particularly upregulated in the S2 stage of CF, while PYL4, PYL8, SRK2I, TOGT1, and others were specifically upregulated in the S3 stage. This evidence concerns the gene ABI1 and cystic fibrosis.