Originally Posted by stillHoping

A new research was recently published in Nature Genetics about duplication and triplications of alpha tryptaseâ encoding sequence and it's association with elevated serum tryptase levels, and dysautonomia, GI symptoms, chronic pain, etc.

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The paper:
Elevated basal serum tryptase identifies a multisystem disorder associated with increased TPSAB1 copy number : Nature Genetics : Nature Research