Microsome

(noun. /my-cro-SOME/) 

by Raeanne Geffert

What does it mean? 

A microsome is a fraction of a cell that contains some enzymes and cellular organelles. They are typically derived from a specific tissue in the body. They are formed by taking a tissue and breaking it up, then centrifuging and separating the microsomes from other cell parts. Microsomes are often used in the lab to incubate drugs at human body temperature over a period of time. This allows the researcher to see how the drug breaks down and which drug products, or metabolites, are formed.

How do I use it in a sentence?

“We are incubating human liver microsomes to determine how a drug forms metabolites over time.”

Image is the author’s own work. Created with Biorender.com.

Related terms

Microsomes can also be called a “liver fraction”. Microsomes are a more specific type of liver fraction.

Fields of study in which this word is commonly used

Commonly used in biology or pharmacy fields.