The difference is in the dosage, with the upper case letters meaning higher quantity.

It is very useful system for expression of proteins in high quantity.

But it is usually there, in surprisingly high quantities.

Its trees are known to produce high quantities of fruits.

There still were quite a number of recurring segments, but again, a much higher quantity than a typical talk show.

Delhi has the third highest quantity of trees among Indian cities.

"If we can do it faster and in higher quantities, we will."

Murphy said "Every academy has its own way, we like to keep quantity low and quality high."

Many other minerals are also present in high quantities.

Monsters that are produced in higher quantities increase their part's volume as well.