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|Minimum Order
Place of Origin:
China
Price for Minimum Order:
-
Minimum Order Quantity:
25 Kilogram
Packaging Detail:
25kg/drum
Delivery Time:
7days
Supplying Ability:
15 Ton per Month
Payment Type:
Other, PayPal, Money Gram, Western Union, D/P, D/A, L/C, T/T
連絡先担当者 Ms. Evelyn
Rm 2405, Unit 1, Buiding 1, Taiyin Tower jianghan Econmic Development Zone, Wuhan, Hubei
|
Item
|
Specification( AJI*2)
|
Results
|
|
Stata of solution
(transmittance)
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Clear and colorless
Not less than *8.0%
|
*8.3%
|
|
Specific rotation [α]D*0
|
**4.0°to
**5.5°
|
**4.2°
|
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Ammonium (NH4)
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Not more than 0.*2%
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Not more than 0.*2%
|
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Sulfate(SO4)
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Not more than 0.**0%
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Not more than 0.**0%
|
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Iron(Fe)
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Not more than *0ppm
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Not more than *0ppm
|
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Arsenic (As2O3)
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Not more than 1ppm
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Not more than 1ppm
|
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Other amino acids
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Chromatographically
Not detectable
|
Conforms
|
|
Heavy metals(Pb)
|
Not more than *0ppm
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Not more than *0ppm
|
|
Loss on drying
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Not more than 0.*0%
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0.*3%
|
|
Residue on ignition
(sulfated)
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Not more than 0.*0%
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0.*6%
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Assay
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*9.0% to **1.0%
|
*9.2%
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PH
|
9.5 to *1.0
|
9.8
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L-Ornithine is one of the products of the action of the enzyme arginase on L-arginine, creating urea. Therefore, ornithine is a central part of the urea cycle, which allows for the disposal of excess nitrogen. Ornithine is recycled and in a manner is a catalyst. First, ammonia is converted into carbamoyl phosphate (phosphate-CONH2), which creates one half of urea. Ornithine is converted into a urea derivative at the δ (terminal) nitrogen by carbamoyl phosphate. Another nitrogen is added from aspartate, producing the denitrogenated fumarate, and the resulting arginine (a guanidinium compound) is hydrolysed back to ornithine, producing urea. The nitrogens of urea come from the ammonia and aspartate, and the nitrogen in ornithine remains intact.
Ornithine is not an amino acid coded for by DNA, and, in that sense, is not involved in protein synthesis. However, in mammalian non-hepatic tissues, the main use of the urea cycle is in arginine biosynthesis, so as an intermediate in metabolic processes, ornithine is quite important. It is believed to not be a part of genetic code because polypeptides containing unprotected ornithines undergo spontaneous lactamization.
