1. b.81.4 Guanosine diphospho-D-mannose pyrophosphorylase/mannose-6-phosphate isomerase linker domain probable rudiment form of the LpxA-like hexapeptide domain Single-stranded left-handed beta-helix superhelix turns are made of parallel beta-strands and (short) turns 2cu2 d2cu2a1 A:258-267,287-295,295-302,304-312,313-320 2cu2 d2cu2a1 A:258-267,287-295,301-305,304-312,313-320