Classify each property below based on whether it is or is not a property of L-Do

Question

Classify each property below based on whether it is or is not a property of L-Dopa's enantiomer, D-Dopa. L-Dopa (Levodopa) is an oral medication used to treat Parkinson's disease, the symptoms of which result from a lack of dopamine in the brain. L-Dopa relies on L-type, or leucine-preferring, transport proteins to cross the blood-brain barrier, and it is converted to dopamine in the brain by the enzyme aromatic-L-amino-acid decarboxylase. Properties of L-Dopa density: 1.47 g/cm^3 melting point: 278 degree C boiling point: decomposes solubility in water: low solubility solubility in lipids: low solubility rotates plane-polarized light counterclockwise

Explanation / Answer

Enantiomers: The isomers which are non superimposable mirror images are called enatiomers.

Enatiomers differ in the direction of rotation of plane polarised light.

IN general enantiomers have similar physical properties but some different chemical properties.

List of property of D - Dopa:

* Solid at room temperature

* Rotates plane polarised light clock wise direction

* Aromatic - L - amino acid decarboxylase has a different affinity for D - Dopa

List that are not property of D - DOpa:

* Highly soluble in water

* Good substrate for aromatic L - aminoacid decarboxylase

* density slightly less than that of L - Dopa

* Reduces symptoms of Parkinson's disease.

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