Chapter 12, Problem 12.21EP

Interpretation Introduction

Interpretation: To determine the meaning of the designation ${\text{P}}_{\text{i}}$.

Concept introduction: ${\text{P}}_{\text{i}}$ is the chemical species which is formed during the conversion of ATP or ADP molecule into AMP molecule. These reactions are considered important in metabolic pathways because a large amount of energy is released which can be utilized for various processes. The reaction for generation of ${\text{P}}_{\text{i}}$ is:

$\begin{array}{c}\text{ATP }+{\text{ H}}_2\text{O}\to \text{AMP }+{\text{ 2P}}_{\text{i}}+2{\text{H}}^{+}+\text{energy}\\ \text{ADP }+{\text{ H}}_2\text{O}\to \text{AMP }+{\text{ P}}_{\text{i}}+{\text{H}}^{+}+\text{energy}\end{array}$