Subject: Is an ATP alternative molecule possible with higher energy storage?

Hi there, i ask this question in terms of speculative and synthetic biology to 
see if it is possible to replace the all-encompassing use of ATP in most 
organisms ith a molecule that does the same job but with higher energy 
content/coupling and therefore all the energy dependant processes in an 
organism would gain greater energy input and efficiency. Do you know what 
processes this would enhance at all if theoretically possible.
Thank you for your time!!!!!

Re: Is an ATP alternative molecule possible with higher energy storage?