Abstract
The single crystals of KDP are grown by slow evaporation solution growth method. The formula is KH2PO4, it is the type of tetragonal system with a=b=7.4580Å, c= 6.9890Å. Peptides are the classification of short ranged bonded array of amino acids. Polypeptide is the long ranged continuum, not branched upon with the chain of peptide, polypeptide have higher molecular mass and are called as proteins. Ala-Ala-Ala types of peptide bonding is combined with KDP for proper interaction mapping an also the pharma utilities. The same procedure can be continued for Arg-Arg-Arg for identifying the variance in scaling factors and ligand. Keywords: Slow evaporation, Peptides, KDP, Ala-Alanine, Arg-Arginine.