1.   b.55.2        PA2021-like  prokaryotiic proteins of PH domain-like fold lacking the N-terminal strand !   
                   PH domain-like barrel barrel, partly opened; n*=6, S*=12; meander; capped by an alpha-helix
                   1ywy  d1ywya1  A:31-38,58-66,67-71,73-84

4.   c.67.2        PhnH-like  single domain protein of similar topology to the core domain of PLP-transferases  
                   PLP-dependent transferase-like main domain: 3 layers: a/b/a, mixed beta-sheet of 7 strands, order 3245671; strand 7 is antiparallel to the rest
                   2fsu  d2fsua1  A:120-127,132-140,146-152,154-164