| 1. | The total number of histidine residues may vary in the tag.
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| 2. | Phenylalanine, tryptophan and histidine are essential amino acids for animals.
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| 3. | This enzyme participates in histidine metabolism and glyoxylate and dicarboxylate metabolism.
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| 4. | There are three aminoacylation specificities, valine, histidine and tyrosine.
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| 5. | Lysine is a base, as are arginine and histidine.
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| 6. | In some MTs, mostly bacterial, histidine participates in zinc binding.
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| 7. | The histidine rich desaturases tend to be integral membrane proteins.
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| 8. | Cysteine 464 and histidine 414 are crucial for this activity.
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| 9. | Both synthesize histidine from the biochemical intermediate phosphoribosyl pyrophosphate.
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| 10. | In general, the histidine biosynthesis is very similar in plants and microorganisms.
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