| Answer | Crossword Clue |
|---|---|
| myoglobin | a protein that stores oxygen in muscle |
| myoglobins | MYOGLOBIN, a protein that stores oxygen in muscle |
| ferritin | amber-colored, crystalline protein, found in the liver, spleen, and bone marrow, that consists of apoferritin combined with a ferric hydroxide-ferric phosphate complex and that stores iron for use in metabolism |
| troponin | protein of muscle tissue that binds calcium ions and is involved in contraction |
