Author: Freesciencelessons via YouTube
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In this video we start looking at the first two levels of protein structure. These are called the primary structure and the secondary structure. We start by looking at how the primary structure and how this is critical for the function of a protein. We then explore what is meant by secondary structure, looking at the alpha helix and the beta pleated sheet.

Image credits:

Haemoglobin

https://commons.wikimedia.org/wiki/File:1GZX_Haemoglobin.png

Zephyris at the English language Wikipedia / CC BY-SA (http://creativecommons.org/licenses/by-sa/3.0/)

Alpha Helix

https://commons.wikimedia.org/wiki/File:PDB_1dn3_EBI.jpg

Jawahar Swaminathan and MSD staff at the European Bioinformatics Institute / Public domain

Beta sheet

https://commons.wikimedia.org/wiki/File:1m8n_Choristoneura_fumiferana.png

WillowW at the English language Wikipedia / CC BY-SA (http://creativecommons.org/licenses/by-sa/3.0/)

Flavodoxin

https://upload.wikimedia.org/wikipedia/commons/2/29/3chy_flavodoxin_fold.png

The original uploader was WillowW at English Wikipedia. / CC BY-SA (http://creativecommons.org/licenses/by-sa/3.0/)

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