Science Quiz / Amino Acids by side-chain

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Can you name the Amino Acids through these clues?

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Side-ChainAmino AcidHint
(2-methyl) propylMost common amino acid in nature
methyl imidazolePositively charged aromatic amino acid
(1-methyl) ethylSmallest atomic mass of any branched chain amino acids
Ethyl group and Methyl group linked via sulfur(Unmodified) Proteins always start with this amino acid
Propanic AcidThis acids salts grant the taste of umami
Cyclic Propyl (bonded with non-side-chain amino group) Only secondary amine of amino acids. Does not form purple complex with ninhydrin.
hydroxy-methyl groupacts as neurotransmitter
methyl bonded to phenolNegatively charged aromatic amino acid
(1-methyl) propylNon-polar and contains two chiral carbons
propyl guanidiniumhighest acid disassociation constant of any amino acid, almost always positively charged
Side-ChainAmino AcidHint
Methyl Simplest alpha amino acid
Methyl group bonded to carboxamideFirst amino acid isolated (from similarly named vegetable)
Ethanoic Acidcoded by GAU and GAC
2- methyl indoleUsed as Flurescent probe
1- hydroxy ethyl groupAlcohol group with two chiral centres
MethiolThiol group very nucleophillic, forms disulfide bridges
methyl bonded to benzylsimplest aromatic amino acid. Found in breast milk.
Ethyl group bonded to carboxamideMost abundant free amino acid in human blood
Butyl group bonded to amino groupIn Jurassic Park, the dinosaurs were unable to produce this amino acid, ensuring they would not survive outside the park (in reality humans can't synthesise ____ either)

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