Fig 7.

List of the major nitrogen source transporters with their regulatory mechanisms. The transporters represented include carriers of one or a few specific amino acids (Lyp1p, Hip1p, Mup1, Dip5p, Tat1p, Tat2p, Gnp1, Agp1p, Bap2p, Bap3p, and Can1p) and the general amino acid carriers Gap1p, the arginine transporter Can1p, and the ammonium permeases (Mep1p, Mep2p, and Mep3) (35, 36). The sizes of the fonts for nitrogen compounds represent the relative abundance in the medium SM200. The regulatory mechanisms controlling the expression of nitrogen permease genes are indicated in orange (SPS) (32) or in green (NCR) (49). The order of nitrogen source consumption during wine fermentation is indicated at the bottom.