The phrase "to label the protein" means attaching a specific marker or tag to a protein molecule in order to track or detect it in a scientific experiment or study. Full definition
Clean label protein is a category that we have been exploring for quite some time. (wlfoods.com)
They used fluorescent antibodies to label proteins specific to cells at different states of maturity. (sciencemag.org)
Arla Foods Ingredients showcased a clean label protein bar prototype made with milk from grass - fed cows without any added hormones at IFT held in Las Vegas last month. (bakeryandsnacks.com)