"Protein abundance" refers to the amount or concentration of a specific protein in a given sample or biological system. It indicates how much of that particular protein is present. Full definition
They also found that freshly collected platelets from diabetics show almost as many changes (more than 100) in protein abundance as healthy donor platelets stored for up to 5 days. (pnnl.gov)
Regardless, our data support a role for ABL kinases in the regulation of TAZ protein abundance and activity in breast cancer cells. (stke.sciencemag.org)
A technical focus is CyTOF mass cytometry, which uses heavy metal - conjugated antibodies in tandem with time of flight mass spectrometry to measure protein abundances at a single cell resolution. (lji.org)