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bacterioferritin in the I422 space group, like 1JGC, has a trimer in the asymmetric unit, but the biological unit is 24-mer! Looking at it another way, considering a dimer is two monomers crosslinked by a heme, the asu contains 1.5 dimers and hence 1.5 hemes! eab On 12/11/2014 07:27 AM, Hay Dvir wrote: > Dear all, > > > We have a structure of a rather tightly packed homotrimer protein in the ASU with no apparent crystallographic or non-crystallographic rotational symmetry between monomers. > Attempting to establish the biological assembly, we are very interested to hear about additional similar cases you might know of. > > Thanks in advance, > Hay > > > --------------------------- > Hay DvirPh. D. > HeadTechnion Center for Structural Biology > TechnionHaifa 3200003, Israel > Tel:+(972)-77-887-1901 > Fax:+(972)-77-887-1935 > [log in to unmask] <mailto:[log in to unmask]> > Websitehttp://tcsb.technion.ac.il >