In HbS, sickle cell hemoglobin, the beta-six position is mutated from Glutamate to Biology In HbS, sickle cell hemoglobin, the beta-six position is mutated from Glutamate to A. Aspartate B. Glutamine C. Asparagine D. Valine E. Tryptophan Answer: D Share this Share on FacebookTweet on TwitterPlus on Google+