| 21. | Histidine was first isolated by German physician Albrecht Kossel and Sven Hedin in 1896.
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| 22. | In the last step, L-histidinal is converted to L-histidine.
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| 23. | Just like animals and microorganisms, plants need histidine for their growth and development.
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| 24. | The virA protein has autokinase activity : it phosphorylates itself on a histidine residue.
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| 25. | Promising supplements include chromium histidine and chromium nanoparticles.
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| 26. | Imidazoleglycerol-phosphate dehydratase is an enzyme catalyzing the sixth step of histidine production.
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| 27. | It contains one histidine residue and five cysteine residues
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| 28. | A histidine is involved in the catalytic mechanism.
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| 29. | It is a secondary disorder of histidine metabolism.
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| 30. | The guanidinium groups and hydrogen on the protonated imidazole ring from the histidine residue.
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