In a previous study, Dombrowski et al. [44], has reported that Treg cells are able to promote myelination and remyelination and its transcriptional factor, Foxp3, is a good indicator of Tregs activity [21, 45].”  Where in the cell does Foxp3 act? The FOXP3 protein is found in an immune system gland called the thymus, where regulatory T cells are produced. Foxp3 is a master regulator of transcription in a specific T-cell type, CD4 (+) regulatory T cells (Treg). Foxp3 is a good indicator of Tregs activity.    By what word or words in the quote of question 10 do you know that your answer to question 10 is correct?

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Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.