Probably act as a zinc ion transporter moving zinc from the nucleus/endoplasmic reticulum to the cytoplasm. Involved in zinc ion homeostasis and cellular distribution. Originally MSC2 was identified in a screen for mutants that show an increase in meiotic unequal sister-chromatid recombination (SCR). MSC2 may also be involved in chromosome instability, rather than SRC. Present with 1070 molecules/cell in log phase SD medium. Belongs to the cation diffusion facilitator (CDF) transporter (TC 2.A.4) family. SLC30A subfamily.