Eukaryotic and Bacterial Ferritin Iron Cages Have Strongly Conserved Structures but Highly Divergent Sequences
(A) Single chain of bacterioferritin from Mycobacterium smegmatis (3bkn, chain A, blue) and horse apoferritin (2za6, chain A, green), with the matching parts in orange and red, respectively.
(B) Superposition of the complete ferritin cages of 3bkn and 2za6. The color scheme is the same as in (A).