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== Somatotropin and Genetic origin ==
== Somatotropin and Genetic origin ==
Somatotropin (GH for ''Growth Hormone'' or HGH for ''Human Growth Hormone'') is a polypeptide hormone produced by the [https://en.wikipedia.org/wiki/Somatotropic_cell somatotropic cells] of the [https://www.britannica.com/science/pituitary-gland pituitary gland].
Somatotropin (GH for ''Growth Hormone'' or HGH for ''Human Growth Hormone'') is a polypeptide hormone produced by the [https://en.wikipedia.org/wiki/Somatotropic_cell somatotropic cells] of the [https://www.britannica.com/science/pituitary-gland pituitary gland].
The Human Growth Hormone, a protein circulating in the blood, has its origin on chromosome 17. There it gets encoded by the Growth hormone 1 gene along with four other related genes. Three of these genes are encoding [https://en.wikipedia.org/wiki/Human_placental_lactogen human chorionic somatomammotropin], which is closely related to somatotropin. They are all in the same transcriptional orientation.
The Human Growth Hormone complex, a protein circulating in the blood, consists of five similiar genes located over a distance of 50 kbp on the long arm of chromosome 17. There it gets encoded by the Growth hormone 1 gene along with four other related genes. Three of these genes are encoding [https://en.wikipedia.org/wiki/Human_placental_lactogen human chorionic somatomammotropin], which is closely related to somatotropin. They are all in the same transcriptional orientation.


== Functions ==
== Functions ==