Pheromones Bind To Receptors

Mating pair forms

Mating pair forms

B. PHEROMONE STRUCTURES a-factor

NH2-Trp-His-Trp-Leu-Gln-Leu-Lys-Pro-Gly-Gln-Pro-Met-Tyr-COOH

B. PHEROMONE STRUCTURES a-factor

NH2-Trp-His-Trp-Leu-Gln-Leu-Lys-Pro-Gly-Gln-Pro-Met-Tyr-COOH

Haploid yeast cells freque ntly change their mating type due to rearrangemnets of DNA at the MAT locus.

MAT locus

C. Diploid cell a factor a factor receptor a factor a factor receptor

TURNS ON a 1

Synthesis of

TURNS ON a 1

Synthesis of a 2

Synthesis of

Turns off Synthesis of

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