Considering the human body has an astronomical amount of protein types and each protein type has an astronomical number of individual proteins, pin-pointing a number is worthless. Your body creates and loses proteins constantly. There are only 4 major types for DNA: adenine, cytosine, guanine and thymine.
As for a # of proteins as a whole: A whole bunch.
human beings need nitrogen for building proteins and o2
Many, depends from where the epithelium comes from.
Pepsin starts digestion of proteins by breaking down the many of polypeptides into shorter peptides.
A substantial portion of it comes from proteins; many proteins contain small amounts of sulfur.
dna has introductions for proteins to combine.
Growing genetically engineered bacteria and collecting human DNA/proteins that they produce.
they can fix nitrogen
All proteins in the human body are made from RNA.
The monomers of proteins are called Amino Acids.
The human genome contains the complete set of genes necessary for human life. However, understanding the human proteome is more important because the proteome contains proteins, or the actual functional molecules of a cell. Understanding proteomes means understanding and controlling mutations, drug interactions, and being able to chemically modify proteins after synthesis.
All proteins are made up of chains of amino acids, the building blocks for protein. When you eat "cow muscle protein," your body breaks the proteins down into amino acids, which are absorbed in the small intestine and then utilized for your body to produce the proteins that we require. Many proteins, however are identical in the cow and human. (i.e. actin and myosin, two proteins that allow for muscle contraction)
nothing at all.