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PPARδ may function as an integrator of transcription repression and nuclear receptor signaling. It activates transcription of a variety of target genes by binding to specific DNA elements. Well described target genes of PPARδ include PDK4 , ANGPTL4 , PLIN2 , and CD36 . The expression of this gene is found to be elevated in colorectal cancer cells. [9] The elevated expression can be repressed by adenomatosis polyposis coli ( APC ), a tumor suppressor protein involved in the APC/ beta-catenin signaling pathway. Knockout studies in mice suggested the role of this protein in myelination of the corpus callosum , epidermal cell proliferation, and glucose [10] and lipid metabolism. [11]

Steroid isolation , depending on context, is the isolation of chemical matter required for chemical structure elucidation, derivitzation or degradation chemistry, biological testing, and other research needs (generally milligrams to grams, but often more [38] or the isolation of "analytical quantities" of the substance of interest (where the focus is on identifying and quantifying the substance (for example, in biological tissue or fluid). The amount isolated depends on the analytical method, but is generally less than one microgram. [39] [ page needed ] The methods of isolation to achieve the two scales of product are distinct, but include extraction , precipitation, adsorption , chromatography , and crystallization . In both cases, the isolated substance is purified to chemical homogeneity; combined separation and analytical methods, such as LC-MS , are chosen to be "orthogonal"—achieving their separations based on distinct modes of interaction between substance and isolating matrix—to detect a single species in the pure sample. Structure determination refers to the methods to determine the chemical structure of an isolated pure steroid, using an evolving array of chemical and physical methods which have included NMR and small-molecule crystallography . [2] : 10–19 Methods of analysis overlap both of the above areas, emphasizing analytical methods to determining if a steroid is present in a mixture and determining its quantity. [39]

Delta 2 steroid results

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