Critical role in copper (specific) homeostasis and detoxification. May protect by directly chelating and sequestering copper ions. Belongs to the metallothionein superfamily. Type 13 family. Could be the product of a pseudogene unlikely to encode a functional protein. Strain S288c has a stop codon in position 9, which disrupts the gene coding for this protein. Because of that it is not part of the S.cerevisiae S288c complete/reference proteome set. Truncated C-terminus. Truncated C-terminus.