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:

Comparison of constitutive and inducible transcriptional enhancement mediated by kappa B-related sequences: modulation of activity in B cells by human T-cell leukemia virus type I tax gene. The kappa B sequence (GGGACTTTCC) binds a factor, NF-kappa B, that is constitutively found in its functional, DNA binding form only in B lymphocytes. A factor with apparently indistinguishable sequence specificity can be induced in many other cell types, where it is used to regulate inducible gene expression. For example, kappa B-related sequences have been shown to be important for the transcription of a few inducible genes, such as the interleukin 2 receptor alpha-chain gene and the beta-interferon gene. However, these genes are not constitutively active in B lymphocytes, suggesting that other regulatory mechanisms must play a role in determining the patterns of expression. We have investigated the constitutive and inducible transcriptional activity mediated by five kappa B-related sequence elements in two different cell types. We show that in S194 plasma cells the activity of each element correlates well with the relative affinity of B-cell-derived NF-kappa B for that element. This leads to significantly lower transcription enhancement by sites derived from the interleukin 2 receptor or T-cell receptor genes in S194 cells. However, in either EL-4 (T) cells or S194 cells, both lower-affinity sites can be significantly induced by the tax gene product of human T-cell leukemia virus type I, showing that NF-kappa B activity can be modulated even in a B-cell line that constitutively expresses this factor.
{"CellLine": ["S194 cells", "S194 plasma cells", "B - cell line", "EL - 4 (T) cells"], "CellType": ["B lymphocytes", "B cells"], "DNA": ["kappa B - related sequence elements", "kappa B sequence", "T - cell receptor genes", "human T - cell leukemia virus type I", "human T - cell leukemia virus type I tax gene", "the tax gene product of human T - cell leukemia virus type I", "beta - interferon gene", "interleukin 2 receptor alpha - chain gene", "kappa B - related sequences"], "Protein": ["interleukin 2 receptor alpha - chain", "interleukin 2 receptor", "tax gene product", "B - cell - derived NF - kappa B", "NF - kappa B", "beta - interferon"], "RNA": []}