The directed movement of a motile cell or organism, or the directed growth of a cell guided by a specific chemical concentration gradient. Movement may be towards a higher concentration (positive chemotaxis) or towards a lower concentration (negative chemotaxis) [goid 6935] [pmid 10725748] [evidence TAS]; A defense response that is mediated by cells [goid 6968] [pmid 10725748] [evidence TAS]; The chemical reactions and pathways involving cholesterol, cholest-5-en-3 beta-ol, the principal sterol of vertebrates and the precursor of many steroids, including bile acids and steroid hormones. It is a component of the plasma membrane lipid bilayer and of plasma lipoproteins and can be found in all animal tissues [goid 8203] [pmid 11971948] [evidence ISS]; The process whereby a precursor cell type acquires the specialized features of a B cell [goid 30183] [pmid 11418631] [evidence TAS]; Any process that activates or increases the rate or extent of B cell proliferation [goid 30890] [evidence ISS]; An immune response which is associated with resistance to extracellular organisms such as helminths and pathological conditions such as allergy, which is typically orchestrated by the production of particular cytokines by T-helper 2 cells, most notably IL-4, IL-5, IL-10, and IL-13, resulting in enhanced production of certain antibody isotypes and other effects [goid 42092] [pmid 11676128] [evidence TAS]; Any process that activates or increases the rate or extent of activated T cell proliferation [goid 42104] [evidence IEA]; Any process that modulates the frequency, rate or extent of addition of phosphate groups into a molecule [goid 42325] [evidence ISS]; Any process that activates or increases the frequency, rate or extent of the introduction of a phosphate group to a tyrosine residue of a Stat5 protein [goid 42523] [evidence IEA]; Any process that stops, prevents or reduces the frequency, rate or extent of cell death by apoptosis [goid 43066] [evidence ISS]; The chemical reactions and pathways resulting in the formation of CTGF, produced by human umbilical vein endothelial cells and by skin fibroblasts after activation with TGF-beta [goid 45189] [pmid 11967989] [evidence TAS]; Any process that modulates the frequency, rate or extent of isotype switching [goid 45191] [pmid 11418631] [evidence TAS]; Any process that activates or increases the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of MHC class II [goid 45348] [evidence ISS]; Any process that stops, prevents or reduces the frequency, rate or extent of osteoclast differentiation [goid 45671] [evidence ISS]; Any process that activates or increases the frequency, rate or extent of transcription from the RNA polymerase II promoter [goid 45944] [evidence ISS]; Any process that activates or increases the frequency, rate or extent of isotype switching to IgE isotypes [goid 48295] [evidence ISS]; Any process that activates or increases the frequency, rate or extent of isotype switching to IgG isotypes [goid 48304] [evidence ISS]; Any process that activates or increases the frequency, rate or extent of the phosphorylation of peptidyl-tyrosine [goid 50731] [evidence IEA]; Any process that modulates the frequency, rate or extent of the immune response, the immunological reaction of an organism to an immunogenic stimulus [goid 50776] [evidence ISS]