Spheroproteins are more commonly called as the globular proteins which are one of the three general classes of proteins (the other classes are the fibrous and membrane proteins). Its classification has been derived from their spherical or "globe-like" structures that are to some extent water-soluble by forming colloids in the water. Spheroproteins have no systematic structures compared with the fibrous proteins. They can form single, double or multiple chains that form random structures and thus can be relatively structuted to be spherical. Common Spheroproteins include albumin, hemoglobin, myoglobin, insulin, globulins in blood, and enzymes.