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Lecture

lecture 5

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Department
Biological Sciences
Course Code
BIOA02H3
Professor
Mary Olaveson

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Lecture 5-Macromolecules
-ProteinsMonomer unit is amino acids
-each protein has different functions, structural, organizational roles
-Distinct amino acid composition, distinct order in which the amino acids are joined
together in any individual molecule
-3d dimensional shape to give functions to proteins
Amino acid is very distinctive molecule, central carbon(considered a-semestric, four side
chained attached to carbon, attached to central carbon)
R-group, variable group attached to the carbon, different in every amino acid, while other
three always remain the same
Proteins- amino acids put together to form a polymer, carboxyl group of 1 amino acid---
peptide linkage for proteins to join two amino acids
Strong covalenbt linkage holding both amino acids together
All living organisms use all 20 basic amino acids
3 very broad geoupings of amino acids, 9 that are non-polar hydrophobic amino acids, r-
group gives this distinction
Glyceine is a very simple amino acid, Proelene in lab 2, cystene contains sulphur
-Secondary structure makes folding structure to make functional protein
Strong covalent peptide bonds for the primary structure
-The tertiary structure, can be a mixture of both alpha and beta folding
-Temperature, and pH, etc affects the folding and formation of the structure of proteins and
amino acids
-Denaturation breaks the protein –bonds are broken
Renaturation-if stress is removed, normal protein can be attained again
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Description
Lecture 5-Macromolecules -ProteinsMonomer unit is amino acids -each protein has different functions, structural, organizational roles -Distinct amino acid composition, distinct order in which the amino acids are joined together in any individual molecule -3d dimensional shape to give functions to proteins Amino acid is very distinctive molecule, central carbon(considered a-semestric, four side chained attached to carbon, attached to central carbon) R-group, variable group attached to the carbon, different in every amino acid, while other three always remain the same Proteins- amino acids put together to form a polymer, carboxyl group of 1 amino acid--- peptide linkage for proteins to join two amino acids Strong covalenbt linkage holding both a
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