Protein - protein interaction play a major part in Bioinformatics and Computational Biology to interpret the basic inherent principles of biological organizations. Compared to the available protein networks and sequences of dissimilar species, the number of exposed PPIs (protein-protein interactions) is still very much confined. In this book, a sequence-based method using the physio-chemical properties of protein residues is proposed by blending a new feature representation Auto-Covariance (AC) and Artificial Neural Network (ANN). Auto-Covariance describes for interactions among amino acids...