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  2. Introduction to proteins and amino acids (article) | Khan Academy

    www.khanacademy.org/science/biology/macromolecules/proteins-and-amino-acids/a/...

    Introduction to proteins and amino acids, their structure, function, and importance in biological systems.

  3. Khan Academy

    www.khanacademy.org/.../v/introduction-to-amino-acids

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  4. Khan Academy

    www.khanacademy.org/science/biology/macromolecules/proteins-and-amino-acids/a/...

    Learn about the different levels of protein structure and how they contribute to the protein's overall shape and function.

  5. Amino acid structure - Khan Academy

    www.khanacademy.org/test-prep/mcat/biomolecules/amino-acids-and-proteins1/v/...

    Amino acids are the building blocks of proteins. They contain an amino group, carboxylic acid group, alpha carbon, and side chain. Most amino acids have a chiral carbon, which allows them to rotate polarized light. Amino acids can have either an L- or D- configuration, but only the L- form is found in the human body.

  6. Overview of protein structure (video) | Khan Academy

    www.khanacademy.org/science/biology/macromolecules/proteins-and-amino-acids/a/...

    Two of them have 141 amino acids, two of them have 146 amino acids, for a total of 574, 574 amino acids. But you see, they don't just go into some random configuration, they come into a configuration that is really good for doing what hemoglobin does, and that is being a transporter for oxygen, being a transporter for oxygen within red blood cells.

  7. Classification of amino acids (video) | Khan Academy

    www.khanacademy.org/test-prep/mcat/biomolecules/amino-acids-and-proteins1/v/...

    Amino acids can be classified according to their side chain's chemical properties (the R-group). This video will show you how! By Tracy Kovach. ... Lesson 1: Amino acids and proteins. Amino acids and proteins questions. Introduction to proteins and amino acids. Amino acid structure and classifications.

  8. Proteins - Khan Academy

    www.khanacademy.org/science/biology/macromolecules/proteins-and-amino-acids/v/...

    Many proteins are formed by not only one strand of amino acids, but many. These proteins are also called polypeptides. Therefore if a protein were to contain only one strand of amino acids it could be called a peptide as you have noticed. But since most proteins are not only composed of one chain you cannot call them a peptide, but a polypeptide.

  9. Overview of translation (article) | Khan Academy

    www.khanacademy.org/science/ap-biology/gene-expression-and-regulation/...

    How the nucleotide sequence of an mRNA is translated into the amino acid sequence of a polypeptide (protein).

  10. Introduction to amino acids (video) | Khan Academy

    www.khanacademy.org/science/biology/macromolecules/proteins-and-amino-acids/v/...

    Amino acids and the central dogma of molecular biology. Amino and carboxyl groups, side chains, and zwitterions.

  11. Introduction to proteins and amino acids (video) | Khan Academy

    www.khanacademy.org/.../v/introduction-to-proteins-and-amino-acids

    Proteins, large biomolecules or macromolecules, play a vital role in almost every biological process. They are made up of chains of amino acids, which are their building blocks. These chains, known as polypeptides, can form complex shapes, contributing to the diverse functions of proteins. Proteins can provide structure, facilitate muscle contraction, catalyze reactions as enzymes, and ...