The M-factor is a pheromone produce upon nitrogen starvation. The production of M-factor is increased by the pheromone signal. The protein undergoes post-translational modification, to remove the C-terminal signal peptide, the carboxy-terminal cysteine residue is carboxy-methylated and S-alkylated, with a farnesyl residue.
Jiyao W et al.(2023). "The conserved domain database in 2023.",