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Proteins (Amino Acid (Amino acids are necessary for life, not all of them…
Proteins
Amino Acid
Amino acids are organic molecules that, when linked together with other amino acids, form
a protein .
Amino acids are essential to life because the proteins they form are involved in virtually
all cell functions.
Although there are hundreds of amino acids found in nature, proteins are constructed from a
set of 20 amino acid
Structure
Generally, amino acids have the following structural properties:
A carbon (the alpha carbon)
A hydrogen atom (H)
A Carboxyl group (-COOH)
An Amino group (-NH2)
A "variable" group or "R" group
Amino acids are necessary for life, not all of them can be produced naturally in the
body. Of the 20 amino acids, 11 can be produced naturally.
Essential aminoacids
can't be produced
histidine, isoleucine, leucine, lysine, methionine,
phenylalanine, threonine, tryptophan, and valine.
Non essential aminoacids
alanine, arginine, asparagine, aspartate, cysteine, glutamate,
glutamine, glycine, proline, serine, and tyrosine
What are proteins
Are organic polymers composed of amino acids.
that play many critical roles in the body.
Examples
antibodies, enzymes, hormones, and collagen.
Functions
structural support, storage of
molecules, chemical reaction facilitators, chemical messengers, transport of
molecules, and muscle contraction.
Protein is a macronutrient necessary for the proper growth and function of the human
body.
A deficiency in protein leads to
muscle atrophy and impaired functioning of the
human body in general.
Excess protein may cause a strain on the liver and kidneys, and may also increase
cancer risk, particularly with protein from animal sources.
MARIANA ROSADO
