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Oldest fossil human protein ever sequenced
...ls, humans, chimpanzees and orangutans from that of gorillas and most other mammals. This sequence difference is at position nine where the amino acid hydroxyproline
is replaced by proline.
The authors suggest that this is a dietary response, as the formation of hydoxyproline requires vitamin C, which is ample i...
...ers glycine , GABA and glutamate , as well as carnitine (used in lipid transport within a cell ), ornithine , citrulline , homocysteine , hydroxyproline
, hydroxylysine , and sarcosine .
Some of the 20 standard amino acids are called essential amino acids , because they cannot be synthesized by ...
...l as two amino acids that are not inserted directly by ribosomes – hydroxyproline
and hydroxylysine – the former composing a rather large percentage...as opposed to the .36 nm of a regular Alpha helical coil. Hydroxylysine and hydroxyproline
play important roles in the stabilisation of the tropocollagen globular str...
...ate (a sugar ). The carbohydrate is usually attached to the protein in a posttranslational modification , at either asparagine , hydroxylysine , hydroxyproline
, serine , or threonine . Possible carbohydrates include glucose , glucosamine , galactose , galactosamine , mannose , fructose , and sialic a...