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: ["RNA", "CellLine", "Protein", "DNA", "CellType"].

Please return the output as a JSON object of the format: {"DNA" : ["TAL1", ...], "RNA": ["mRNAs", ...], "CellLine": ["T cells", ...], "CellType": ["monocytes", ...], "Protein": ["IL-2", ...]}. 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:

A human putative lymphocyte G0 / G1 switch gene containing a CpG-rich island encodes a small basic protein with the potential to be phosphorylated. Genes actively involved in the G0 / G1 switch (G0S genes) may be differentially expressed during the lectin-induced switch of lymphocytes from the G0 to the G1 phases of the cell cycle. This paper presents studies of G0S2, a member of a set of putative G0S genes, for which cDNAs were cloned and selected on the basis of differential cDNA hybridization. G0S2 mRNA increases transiently within 1-2 hr of the addition of lectin or cycloheximide to cultured blood mononuclear cells. Comparison of a nearly full-length cDNA sequence with the corresponding genomic sequence reveals one small intron and an open reading frame in the second exon. The derived 103-amino-acid basic protein has two potential alpha-helical domains separated by a hydrophobic region with the potential to generate turns and assume a beta-sheet conformation. Consistent with involvement in the G0 / G1 switch, the protein contains potential sites for phosphorylation by protein kinase C and casein kinase II. The gene contains a CpG-rich island suggesting expression in the germ line. An upstream segment contains tandem dinucleotide repeats (CT) 19 / (CA) 16. There is a suitably located TATA box, but potential sites for CCAAT-box binding factors are far upstream, embedded in a 42-nucleotide repeat element. Potential sites for transcription factors AP1, AP2, and AP3 are consistent with rapid transcriptional activation in response to inducing agents.
{"CellLine": [], "CellType": ["lymphocytes", "cultured blood mononuclear cells"], "DNA": ["genomic sequence", "cDNAs", "exon", "the G0 / G1 switch", "open reading frame", "(CT) 19 / (CA) 16", "TATA box", "nearly full - length cDNA sequence", "human putative lymphocyte G0 / G1 switch gene", "G0 / G1 switch", "G0S2", "CpG - rich island", "42 - nucleotide repeat element", "upstream segment", "CCAAT - box", "tandem dinucleotide repeats"], "Protein": ["AP1", "alpha - helical domains", "103 - amino - acid basic protein", "CCAAT - box binding factors", "small basic protein", "AP3", "AP2", "hydrophobic region", "CpG - rich island", "casein kinase II", "protein kinase C", "lectin", "transcription factors"], "RNA": ["G0S genes", "G0S2 mRNA"]}