Image removed due to copyright considerations See Figure 2 in Hochstrasser M. Evolution and function of ubiquitin-lik protein-conjugation systems Nat Cell Biol. 2000 Aug; 2(8): E153-7 MocK El El like Fsc like RHD FS-S RHD El- RHD FS RHD HS El- RHD HS. RHDHS RHD上S Potential Parallels between Sulphurtransferases and UBI Transferases After Figure 4 in Hochstrasser M. Evolution and function of ubiquitin-Iil protein-conjugation systems. Nat Cell Biol. 2000 Aug 2( 8): E153-Image removed due to copyright considerations. See Figure 2 in Hochstrasser M. Evolution and function of ubiquitin-like protein-conjugation systems. Nat Cell Biol. 2000 Aug; 2 (8): E153-7. Figure by MIT OCW. After Figure 4 in Hochstrasser M. Evolution and function of ubiquitin-like protein-conjugation systems. Nat Cell Biol. 2000 Aug ;2 (8): E153-7