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Belonging to the ribosomal protein L21P family, MRPL21 plays an important role in translation and RNA binding. These Mammalian mitochondrial ribosomal proteins contain a small 28S subunit and a large 39S subunit, and consist of 75% protein to rRNA composition. The ribosomal proteins also help in protein synthesis within the mitochondrion. This gene also acts as a structural component of mitochondrial ribosomes, and encodes the 39S subunit protein.
