RNA, ribosomal 2, also known as RNR2, is a human

gene In biology, the word gene (from , ; "... Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a b ...

coding for ribosomal RNA. Genes for

ribosomal RNA Ribosomal ribonucleic acid (rRNA) is a type of non-coding RNA which is the primary component of ribosomes, essential to all cells. rRNA is a ribozyme which carries out protein synthesis in ribosomes. Ribosomal RNA is transcribed from ribosom ...

are clustered on the short arms of chromosomes 13 (

RNR1 RNA, ribosomal 1, also known as RNR1, is a human gene In biology, the word gene (from , ; "... Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can ha ...

), 14 (RNR2), 15 ( RNR3), 20 (

RNR4 RNA, ribosomal 4, also known as RNR4, is a human gene. References Further reading * Nucleolus organizer region ] Nucleolus organizer regions (NORs) are chromosome, chromosomal regions crucial for the formation of the nucleolus. In humans, th ...

), Chromosome 21 (human), 21 ( RNR5). The gene for RNR2 exists in multiple copies on

chromosome 14 Chromosome 14 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 14 spans about 107 million base pairs (the building material of DNA) and represents between 3 and 3.5% of the total DNA ...

. Each gene cluster contains 30–40 copies and encodes a 45S RNA product that is then processed to form 18S, 5.8S and 28S

rRNA Ribosomal ribonucleic acid (rRNA) is a type of non-coding RNA which is the primary component of ribosomes, essential to all cells. rRNA is a ribozyme which carries out protein synthesis in ribosomes. Ribosomal RNA is transcribed from ribosoma ...