In many cases, the activity of particular genes was tied to a single genetic variant, with strong differences in frequency between European and African populations. (sciencedaily.com)
Yet a single genetic variant may explain why drugs that treat other autoimmune diseases tend to make MS symptoms worse, and could identify other MS patients who might benefit from the therapies. (scientificamerican.com)
«There are hundreds of candidate genes to sort through, and a single genetic variant may have different effects even within the same family. (sciencedaily.com)