Component of the monopolin complex which promotes monoorientation during meiosis I, required for chromosome segregation during meiosis. Involved in rDNA silencing. Component of the monopolin complex composed of at least CSM1, LRS4 and MAM1. The complex associates with the kinetochore. Transiently released from the nucleolus and localized to the centromere regions during late pachytene. This relocation is CDC5 dependent. Phosphorylated by CDC5. This phosphorylation is required for the location to the kinetochores during late pachytene. Present with 1390 molecules/cell in log phase SD medium.