text: The H93G mutant of this protein can be used to model the class of proteins to which this protein belongs.
full_question: The H93G mutant of this protein can be used to model the class of proteins to which this protein belongs. This protein reduces nitrites to generate nitric oxide 36 times faster than a related protein. This protein is present in the urine of patients with malignant hyperthermia, phosphofructokinase deficiency, and McArdle's disease. This 153 amino acid protein contains 8 right handed alpha-helices, which comprise 75% of its secondary structure. The presence of this nephrotoxic protein in urine is an indicator of rhabdomyolysis. This protein's distal histidine stabilizes the non-cooperative binding of it to its major ligand. The red color of meat is caused by this protein, which allows deep diving mammals to hold their breaths for a very long time. For 10 points, name this protein that carries oxygen in muscle tissue.
first_sentence: The H93G mutant of this protein can be used to model the class of proteins to which this protein belongs.
raw_answer: myoglobin