▁to ▁serve ▁in ▁the ▁Swedish ▁army . ▁ ▁He ▁returned ▁to ▁the ▁Kar olin ska ▁Institut et ▁where ▁he ▁earned ▁his ▁doctor al ▁degree ▁under ▁advice ▁from ▁Professor ▁Erik ▁J or pes ▁in ▁ 1 9 4 6 . ▁ ▁Develop ing ▁the ▁Ed man ▁D eg rad ation ▁ ▁At ▁the ▁time ▁Ed man ▁started ▁working ▁on ▁An gi ot ens in , ▁it ▁was ▁just ▁being ▁recognized ▁that ▁prote ins ▁are ▁distinct ▁entities ▁with ▁a ▁defined ▁mole cular ▁mass , ▁electric ▁charge ▁and ▁structure . ▁This ▁inspired ▁Ed man ▁to ▁develop ▁a ▁method , ▁that ▁could ▁be ▁used ▁to ▁determine ▁the ▁sequence ▁of ▁am ino ▁ac ids ▁in ▁the ▁protein . ▁In ▁ 1 9 4 7 ▁he ▁was ▁awarded ▁a ▁travel ▁st ip end ▁to ▁go ▁to ▁Rock ef eller ▁Institute ▁of ▁Medical ▁Research . ▁When ▁he ▁returned ▁to ▁Sweden ▁in ▁ 1 9 5 0 ▁to ▁be ▁an ▁Ass istant ▁Professor ▁at ▁the ▁University ▁of ▁Lund , ▁he ▁published ▁his ▁first ▁paper ▁using ▁the ▁method ▁later ▁known ▁as ▁Ed man ▁de grad ation , ▁to ▁determine ▁the ▁sequence ▁of ▁a ▁protein . ▁To ▁his ▁death ▁he ▁continued ▁to ▁work ▁to ▁improve ▁the ▁method ▁to ▁be ▁able ▁to ▁determine ▁longer ▁st ret ches ▁with ▁smaller ▁amounts ▁of ▁sample . ▁ ▁Late ▁career ▁ ▁In ▁ 1 9 5 7 ▁he ▁moved ▁to ▁Australia ▁to ▁be ▁the ▁director ▁of ▁St . ▁Vincent ' s ▁School ▁of ▁Medical ▁Research . ▁In ▁ 1 9 6 7 ▁he ▁successfully ▁developed ▁an ▁autom ated