The Structure of Proteins Primary Structure The primary structure of a protein is the type and sequence of the amino acids used in the polypeptide. ... Any further structure is a result of the primary structure's sequence. ... Tertiary Structure The tertiary structure is that which causes the secondary structure itself to fold around, creating an even more complex structure. ... Various types of bonds are used in these links: hydrogen bonds between R groups, disulphide bonds between two cysteines molecules, as in the primary structure, ionic bonds between R groups containing ...

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