2.   d.161.1       ADC synthase  the active site is formed by additional structures inserted into the core structure !   
                   ADC synthase duplication: contains four repeats of alpha-beta(2)-beta motif arranged in a 4 layer core structure: alpha/beta/beta/alpha; orthogonally packed beta-sheets
                   1k0e  d1k0ea_  A:16-28,225-238,238-248,249-257,444-453
                   1k0g  d1k0ga_  A:16-26,225-238,238-248,249-257,444-453
                   1k0e  d1k0eb_  B:16-28,225-238,238-248,249-257,444-453
                   1i7s  d1i7sa_  A:20-30,276-289,291-299,300-307,503-515
                   1i1q  d1i1qa_  A:20-30,276-289,291-299,300-307,503-515
                   1i7q  d1i7qa_  A:20-30,276-289,291-299,300-308,503-515
                   1i7s  d1i7sc_  C:20-30,276-289,291-299,300-307,503-515
                   3bzn  d3bzna1  A:39-48,206-219,220-229,231-239,421-430
                   1i7q  d1i7qc_  C:20-30,276-289,291-299,300-308,503-515
                   2fn0  d2fn0a1  A:13-28,207-220,222-230,231-239,413-432
                   2fn1  d2fn1a1  A:13-28,207-220,222-230,231-239,413-432
                   1k0g  d1k0gb_  B:16-26,225-238,238-248,249-257,432-451