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Hi Shankar, If you mean what I think you mean - yes, hundreds - but it depends on how strict you are about "identical' Lots of proteins have repeat domains in them with the same fold (and homologous sequence) and therefore very similar (if not quite identical) tertiary structure. Some examples include; complement factor H (20 CCP domains in a row), proteins involved in cell motility like Zyxin, TES and Lmo6 (triple LIM domains), Receptor Tyrosine kinases like RET that have 4 cadherin-like repeats... the list goes on and on. HTH David 2009/7/2 Shankar Prasad Kanaujia <[log in to unmask]>: > Dear CCP4 users, > Is there any multi-domain protein (with at least two domains) which has > identical tertiary structure of each domain ? > > Thanking you. > > -regards > shankar > > > -- ============================ David C. Briggs PhD Father & Crystallographer http://drdavidcbriggs.googlepages.com/home Skype: DocDCB ============================