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Old 06-26-2011
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Question Fibroblast post-translational hydroxylation of amino acids!

Which of the following amino acids is post-translationally hydroxylated in the cytoplasm of fibroblasts?

A. Cysteine
B. Glycine
C. Proline
D. Serine
E. Tyrosine
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Old 06-26-2011
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I think its Proline
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Old 06-26-2011
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Default proline

i think the answer is proline.
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Old 06-26-2011
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it is proline...
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Old 06-26-2011
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Quote:
Originally Posted by earthpole View Post
Which of the following amino acids is post-translationally hydroxylated in the cytoplasm of fibroblasts?

A. Cysteine
B. Glycine
C. Proline
D. Serine
E. Tyrosine
fibroblasts => collagen => Proline
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Old 06-26-2011
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Arrow If CYTOPLASM in the question...

Quote:
Originally Posted by bebix View Post
fibroblasts => collagen => Proline
.... includes ER (Endoplasmic Reticulum) then yes, if not, then it should be a different answer!
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Old 06-26-2011
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B - glycine...
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Oooops.... Thought it was asking what collagen is made of. Hydroxylation is proline
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Old 06-27-2011
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Quote:
Originally Posted by earthpole View Post
Which of the following amino acids is post-translationally hydroxylated in the cytoplasm of fibroblasts?

A. Cysteine
B. Glycine
C. Proline
D. Serine
E. Tyrosine

C)...hydroxylated proline is only found in the collagen nd no other protein in humans...m nt sure whether the reaction occurs in the cytoplasm..
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Old 06-27-2011
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i agree with proline
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Old 06-27-2011
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Default c

c) proline --> hydroxyproline
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