11. In fact, most successful protein designs have involved globular proteins . 12. Almost all globular proteins are soluble and many are enzymes. 13. The term " globulin " is sometimes used synonymously with " globular protein ". 14. Globular proteins frequently assume a stable structure, unlike fibrous proteins, which have multiple conformations.15. In particular, globular proteins are comparatively easy to crystallize in preparation for X-ray crystallography. 16. Nematode sperm is thought to be the only eukaryotic cell without the globular protein G-actin. 17. Membrane proteins are a common type of proteins along with soluble globular proteins , medicinal drugs. 18. They are cysteine-rich globular proteins containing five disulfide bonds. 19. NCS-1 is a globular protein consisting of ten alpha-helices. 20. Using pepsin, they were the first to discern the diffraction pattern of a wet, globular protein .