Sean Krivitsky ‘27 Figure 1. Antibodies traveling through the bloodstream. Protein tyrosine phosphorylation is a reversible process in which a phosphate group can be added or removed from tyrosine residues of various proteins by protein tyrosine kinases (PTKs) and protein tyrosine phosphatases (PTPs), respectively. This type of post-translational modification is responsible for regulating many signal transduction pathways in the cell. The activity of a specific … Continue reading Developing Antibodies to Combat Cancer