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:

Tipping the energy balance toward longevity.
AMPK is a cellular energy sensor conserved across eukaryotes that in C. elegans prolongs life span and mimics dietary restriction. Stenesen and colleagues (2012) activate AMPK both directly and indirectly by altering AMP biosynthesis to slow aging in Drosophila, highlighting AMPK as a conserved life span modulator that links energy sensing to longevity.
{"Chemical": ["AMP"], "Protein": ["AMPK"]}