Biology 1201A Lecture Notes - Lecture 1: Threonine, Glutamine, Phenylalanine
2 Oct 2016
School
Department
Course
Professor
Document Summary
Epigenetics explains how different parts of the sequence are expressed. Nonsuperimposable mirror images: only l-amino acids are found in proteins, amino acids are classified based on their r group (charge, h-bonding ability, and acidic/basic), two main categories: hydrophobic and hydrophilic, hydrophobic amino acids are non-polar. Includes aa with alkyl/aliphatic & with aromatic r groups: hydrophilic amino acids are polar. Includes neutral, acidic, and basic r-groups: hydrophobic, non-polar, aliphatic/alkyl r groups, glycine (-h), alanine(-ch3), proline (r-group is ring, bonds with amino group twice), Ch2ch2sch3: non-polar side chains consist mostly of hydrocarbons, any functional groups are uncharged at biological ph (ph = 7. 0, hydrophobic, non-polar, aromatic r groups, phenylalanine (-ch2-benzene), tryptophan (two rings). Oh group makes it polar so we classify it as hydrophilic neutral: aromatic r-groups can absorb uv light. T groups can form hydrogen bonds (specifically, hydroxyl groups of serine and threonine, amide groups of asparagine & glutamine, and to a lesser extent the sulfhydryl group of.
