• Sequence
  • In the absence of sequence similarity, the SMPI structure shows clear similarity to both domains of the eye lens crystallins, both domains of the calcium sensor protein-S, as well as the single-domain yeast killer toxin. (wikipedia.org)
  • homology
  • Interestingly and perhaps excitingly from an evolutionary perspective, some crystallins are active enzymes, while others lack activity but show homology to other enzymes. (wikipedia.org)
  • Greek
  • Has a two-domain beta-structure, folded into four very similar Greek key motifs. (abcam.cn)
  • The structure can be considered as two Greek key motifs with 2-fold internal symmetry, a Greek key beta-barrel. (wikipedia.org)