. S-(2-boro-noethyl)-l-cysteine (BEC). His120 and His145, and thecorresponding His101 and His126 in arginase I, weredescribed among the ligands for coordination ofMn2+A and Mn2+B, respectively [9,24].. [9]. As indicated by thecrystal structure, Mn2+A and Mn2+Bare, respectively,coordinated by His120 and His145, which are equival-ent to the histidines at position 101 and 126 in thesequence. change, using experimental and com-putational methods, will be initiated soon in ourlaboratory.General conclusionsIn addition to substantiate the participation of His120 and His145 as ligands...