1EI3:
reference: Crystal structure of native chicken fibrinogen at 5.5-A resolution., Yang Z, Mochalkin I, Veerapandian L, Riley M, Doolittle RF, Proc Natl Acad Sci U S A 2000 Apr 11;97(8):3907-12. PMID: 10737772

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).