Compare and contrast the chemical structure of the amino acids leucine, serine, and cysteine.?

Explain how the functional groups of these amino acids contribute to differences in their properties.

Answer:
Leucine -- an isobutyl group (CH2CHMe2)
very non-polar. Bulky steric effects
Serine -- hydroxymethyl group (CH2OH)
very polar and hydrogen bonding
Cysteine -- sulfhydrylmethyl group (CH2SH)
polar and capable of forming disulfide bridges (-H2)

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