In biochemistry, the tertiary structure of a protein is its overall folding, the shape it has under physiological conditions (e.g., inside a cell). Protein folding is essential for its function as, for example, an enzyme. Bioinformatics tries to find ways to predict the folding from the primary structure. An important type of chemical bond involved in forming the tertiary structure of many proteins is the disulfide bond.
... urethra is about 8 inches (200 mm) long and opens at the end of the penis.
Medical problems of the urethra:
Hypospadias[?] is a form of abnormal development of the ...