Small ubiquitin-related modifier 2 (UniProt P61956; a.k.a. HSMT3, Sentrin-2, SMT3 homolog 2, Smt3B, SUMO-2, Ubiquitin-like protein SMT3B) and 3 (UniProt P55854; a.k.a. SMT3 homolog 1, Smt3A, SUMO-3, Ubiquitin-like protein SMT3A) are encoded by the SUMO2 (a.k.a. SMT3B, SMT3H2; Gene ID 6613) and SUMO3...