Three nobles were fleeing
after the monarchy had been overthrown

Three non-polar amino acids were trying to get away
from the polar gel they were on

They were escaping through means of a merchant who dealt with the black market
He gave priority to those who paid a heftier sum

The amino acids were aided by a non-polar liquid solution
The more non-polar the amino acid the higher up the solution could get them

But alas! For the merchant lacked the resources to
get the nobles out of danger

The amino acids all eventually reached the top of the gel sheet
But they would need extra aid to go over the top

And that is my science class