Phosphorylation of ADP to ATP occurs through energy metabolic comprising oxidation phosphorylation or substrate-level phosphorylation or photo phosphorylation (in plants). ATP can also be also be formed from ADP through the action of adenylase Kinase. The crystal structure determination of adenylase Kinase shows that the C-terminal region has the sequence.
Val-Asp-Asp-Val-Phe-Ser-Gin-Val-Cys-Thr-HIS-Leu-Asp-thr-Leu-LysWhat can be a possible conformation of this sequence -