Contributions

Xiangming Xu drafted the initial text, which was edited and expanded upon by Will Webb.
Xiangming Xu created figures 1-6. The initial captions were done by both parties and then mutually edited.
Will Webb wrote the introduction and conclusion, which were edited and expanded upon by Xiangming Xu
The sections relating to ATPase activity, the external helix and the structures of PglK were done in equal parts by both parties
The webpage layout is designed by Xiangming Xu.