Summary
By relating the increase in glutamine to the corresponding increase in valine following protein loading it has been possible to detect carriers of OCT deficiency.
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Briddon, A., Oberholzer, V.G. Glutamine-valine index — An aid in the detection of urea-cycle disorders. Amino Acids 1, 247–250 (1991). https://doi.org/10.1007/BF00806922
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DOI: https://doi.org/10.1007/BF00806922