▁South ▁Korean ▁research ▁team ▁led ▁by ▁Professor ▁H w ang ▁W oo - su k , ▁published ▁claims ▁to ▁have ▁derived ▁stem ▁cell ▁lines ▁via ▁SC NT , ▁but ▁supported ▁those ▁claims ▁with ▁fabric ated ▁data . ▁Rec ent ▁evidence ▁has ▁proved ▁that ▁he ▁in ▁fact ▁created ▁a ▁stem ▁cell ▁line ▁from ▁a ▁par then ote . ▁ ▁Though ▁there ▁has ▁been ▁numerous ▁success es ▁with ▁cl oning ▁animals , ▁questions ▁remain ▁concerning ▁the ▁mechan isms ▁of ▁re programming ▁in ▁the ▁ov um . ▁Despite ▁many ▁attempts , ▁success ▁in ▁creating ▁human ▁nuclear ▁transfer ▁emb ry onic ▁stem ▁cells ▁has ▁been ▁limited . ▁There ▁lies ▁a ▁problem ▁in ▁the ▁human ▁cell ' s ▁ability ▁to ▁form ▁a ▁bl asto c yst ; ▁the ▁cells ▁fail ▁to ▁progress ▁past ▁the ▁eight ▁cell ▁stage ▁of ▁development . ▁This ▁is ▁thought ▁to ▁be ▁a ▁result ▁from ▁the ▁som atic ▁cell ▁nucle us ▁being ▁unable ▁to ▁turn ▁on ▁emb ry onic ▁gen es ▁cru cial ▁for ▁proper ▁development . ▁These ▁earlier ▁experiments ▁used ▁procedures ▁developed ▁in ▁non - pr imate ▁animals ▁with ▁little ▁success . ▁ ▁A ▁research ▁group ▁from ▁the ▁Oregon ▁Health ▁& ▁Science ▁University ▁demonstrated ▁SC NT ▁procedures ▁developed ▁for ▁prim ates ▁successfully ▁using ▁skin ▁cells . ▁The ▁key ▁to ▁their ▁success ▁was ▁util izing ▁o ocy tes ▁in ▁met aph ase ▁II ▁( M II ) ▁of ▁the ▁cell ▁cycle . ▁E gg ▁cells ▁in ▁M II ▁contain ▁special ▁factors ▁in ▁the ▁cy top las m ▁that ▁have ▁a ▁special ▁ability ▁in ▁re programming