Catalysis of the transfer of FAT10 from one protein to another via the reaction X-FAT10 + Y = Y-FAT10 + X, where both X-FAT10 and Y-FAT10 are covalent linkages. [ GOC:mah http://www.ncbi.nlm.nih.gov/pubmed/12826404 GOC:dph ]
This is just here as a test because I lose it