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                A unique fold
                  of a core of 10-12 𝞫 strands, a region that bisects the SET
                  domain, referred to as the iSET, which contributes to substrate
                  recognition, and extended loops. 
                   
                
                
                The
                  SET domain is flanked by two heterologous regions at its N- and
                  C-terminus, referred to as nSET and cSET. The cSET contains
                  conserved residues that are important for substrate binding and
                  for catalysis. 
                   
                
                
                The
                  cSET region folds back onto the SET domain threading through a
                  loop formed by a preceding stretch of the sequence to create a
                "pseudoknot".  
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