Could be the product of a pseudogene unlikely to encode a functional protein. This is a truncated version of guanine nucleotide exchange factor SDC25. Strain S288c has a frameshift in position 92, which disrupts the gene coding for this protein and produces two ORFs YLL016W and YLL017W. Because of that it is not part of the S.cerevisiae S288c complete/reference proteome set. A contiguous sequence for SDC25 can be found in strain W303 (AC P0CF32).