Hemerythrin source

Figure 1. Some protein structures solved by X-ray crystallography. The figure illustrates the different secondary structure assemblies. a-Helices are represented by spirals or cylinders -strands by arrows, (a) Hemerythrin, an all a-protein. (b) Superoxide dismutase, an all /7-protein, (c) Lysozyme, an a -i- /7 protein, (d) and (e) Two orthogonal views of the NAD binding domain of lactate dehydrogenase, an a/p protein, (f) Triose phosphate isomerase, an a/p structure, (g) A DNA binding protein, the CAP protein from E. coli. (h) Influenza virus haemaglutinin. (i) Influenza virus neuraminidase. From Blake and Johnson [12b], which also contains references to the original sources of these structures.

The methods of preparing solutions of hemerythrin and crystallizing the pigment differ sligtly according to the source of the protein (Florkin, 1933 Roche, 1935 Klotz et al., 1957 Boeri and Ghiretti-Magaldi, 1957). 

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