Proteins are the workhorses that facilitate most biological processes in a cell.
The majority of proteins interact with other proteins for proper function Publication of the human genome Development of the field of proteomics,
Two types Stable Transient Both types can be weak or strong
Alter the kinetic properties of enzymes Allow for substrate channeling Create a new binding site Inactivate or destroy a protein Change the specificity of a protein for interaction with different proteins Serve a regulatory role
SlowTime consumingNot accurateDifficult to handleCostlyLack of equipments