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I'm reading a journal article about mitochondrial protein import and it mentions that one of the mutant proteins tested showed background binding with another protein. What the heck is background binding?

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Was an IP involved by any chance? – dd3 Mar 27 '13 at 3:47
"Background binding" usually refers to aspecific binding between two proteins. The details depend on the test that was used. – nico Mar 27 '13 at 6:46
can you post a link to the article? – MattDMo Mar 27 '13 at 13:42

Background binding in this case would be the extent to which two proteins associate together by chance.

A hypothetical example: you may have a mitochondrial protein import complex. Usually cases there is a specific peptide sequence the import complex binds to , but proteins without an import peptide sequence will occasionally be bound to the import complex. This is called the background binding for the protein complex. The experimentalists might have measured this by cutting the import peptide sequence off a mitochondrial protein for instance.

Any candidate would have to bind to the complex more than the background case to be considered a target for mitochondrial import.

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