Figure 1 - full size

 

Figure 1.
Fig. 1. Overall structure of the factor XIII dimer. Panel A is the dimer looking down the two-fold axis. The domains, activation peptide (AP), and N and C termini of one monomer are labeled. Panel B shows one monomer, rotated 90° with the domains, N terminus, active site (AS), and ion sites labeled. For both views, three unique spheres are also shown: novel ytterbium site on the dimer two-fold axis (medium gray), active site (light gray), and main ion site (dark gray).

The above figure is reprinted by permission from the ASBMB: J Biol Chem (1999, 274, 4917-4923) copyright 1999.