The basis of this computational model is the affinity of antibodies towards peptide sequences.
Similar to DNA computing, the parallel interactions of peptide sequences and antibodies have been used by this model to solve a few NP-complete problems.
For instance, while DNA is made of four building blocks, peptides are made of twenty building blocks.
However, unlike DNA computing, this model is yet to be practically realized.
The main limitation is the availability of specific monoclonal antibodies required by the model.