What are proteins and what do they do? Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the bodyâs tissues and organs. Proteins are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains. There are 20 different types of amino acids that can be combined to make a protein. The sequence of amino acids determines each proteinâs unique 3-dimensional structure and its specific function. Proteins can be described according to their large range of functions in the body, listed in alphabetical order:
Vena contracta is the narrowest region of a jet that occurs just below the orifice of a regurgitant valve as assessed by colour flow mapping during echocardiography.ven though the measurement of the vena contracta is less dependant on technical factors, small errors in measurement can by multiplied due to the relatively small values of the vena contracta width. Measurement of vena contracta is useful in assessing the severity of mitral regurgitation and aortic regurgitation.
The Nature of Contracts in The Merchant of Venice - The Nature of Contracts in The Merchant of Venice In Shakespeareâs play The Merchant of Venice there are two major contractâs made, a contract is any promise or set of promises made by one party to another for the breach of which the law provides a remedy.