Protein kinases are enzymes that catalyze phosphorylation of target proteins at specific sites, whereas protein phosphatases catalyze removal of phosphate(s) from phosphorylated proteins. Phosphorylation and dephosphorylation can function as an on-off switch for a protein's activity, most likely through
A) the change in a protein's charge leading to a conformational change.
B) the change in a protein's charge leading to cleavage.
C) a change in the optimal pH at which a reaction will occur.
D) a change in the optimal temperature at which a reaction will occur.
Insertion of membrane proteins into the ER membrane
Oil drop model of protein folding
Motifs of protein secondary structure
Protein Macromolecules
Activation of amino acids for incorporation into proteins
Protein Digestion and Absorption