NCIt definition : The biosynthesis of new (often sets of distinct, functionally related) protein products,
usually involving new mRNA transcripts, typically in response to an activating stimulus.;
Alternative definition : NCI-GLOSS: Refers to the amount of a protein made in a cell. The study of protein
expression in cancer cells may give information about a specific type of cancer, the
best treatment to use, and how well a treatment works.;