You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Protein", "Chemical"].

Please return the output as a JSON object of the format: {"Chemical" : ["Dexamethasone", ...], "Protein" : ["BRCA-1", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

N2-acetylphenelzine: effects on rat brain GABA, alanine and biogenic amines.
The neurochemical properties of N2-acetylphenelzine were compared with those of phenelzine in a rat model. N2-Acetylphenelzine is a relatively potent inhibitor of monoamine oxidase-A and -B and causes increases in whole-brain levels of noradrenaline and 5-hydroxytryptamine, and decreases in homovanillic acid, 5-hydroxyindole-3-acetic acid, and 3,4-dihydroxyphenylacetic acetic after acute i.p. administration of the drug. Phenelzine is a more potent monoamine oxidase inhibitor than is N2-acetylphenelzine. The most marked difference in the profile was that N2-acetylphenelzine had no effect on whole brain levels of the amino acid neurotransmitters alanine and gamma-aminobutyric acid, whereas phenelzine caused dramatic increases. Acetylation of phenelzine at the N2 position presumably interferes with the inhibition of the transaminase enzymes for gamma-aminobutyric acid and alanine.
{"Chemical": ["amines", "N2", "gamma-aminobutyric acid", "homovanillic acid", "amino acid", "phenelzine", "5-hydroxyindole-3-acetic acid", "N2-acetylphenelzine", "alanine", "5-hydroxytryptamine", "Phenelzine", "3,4-dihydroxyphenylacetic acetic", "monoamine", "GABA", "noradrenaline", "N2-Acetylphenelzine"], "Protein": ["transaminase", "monoamine oxidase-A and -B", "monoamine oxidase"]}