<p>These proteins include Ypi1, a novel <taxon tax_id="4932">Saccharomyces cerevisiae</taxon> type 1 protein phosphatase inhibitor [<cite idref="PUB00014282"/>] and ppp1r11/hcgv (<db_xref db="SWISSPROT" dbkey="O60927"/>), annotated as having protein phosphatase inhibitor activity [<cite idref="PUB00014270"/>].</p>