The interaction energy of DN and PB with 3ZMI is -122.14 kj/mol and -116.78 kj/mol respectively whereas -128.19 kj/mol interaction energy of DN with 4URM whereas the interaction energy of -111.19 kj/mol of PB with 4urm. Both the molecules demonstrate Van der Waals interactions and C-H interaction. The amino-acid's non-covalent interaction with 4urm and 3zmi makes them a perfect candidate for the experimental studies. The docking studies of κ has been reported elsewhere. The docking studies of κ demonstrated very good interaction with 4URM and 3, hence confirming the antibacterial activity against gram positive and gram-negative bacterial strains. The results are shown in Figure . The results showed that maximum Cr 3+ ions were adsorbed at the pH of 6. Whereas, the pH of the system raised the sorption of Cr 3+ ions from pH 3 to pH 6 and then suddenly started declining at pH 7-9. The pH effect on the Cr 3+ ion percentage adsorption has been shown in Figure . Figure : Antibacterial activities of κ and Cr 3+ complex over gram-positive and negative species at a dose of 50 µg/100 µl.