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231222s1998 xx ||||| 00| ||eng c |
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|a pubmed25n0382.xml
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|a (DE-627)NLM114415609
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|a (NLM)11543585
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Singh, S
|e verfasserin
|4 aut
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| 245 |
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|a Nitrogen recycling during phenylpropanoid metabolism in sweet potato tubers
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| 264 |
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|c 1998
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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| 500 |
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|a Date Completed 25.03.2000
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|a Date Revised 30.09.2020
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|a published: Print
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|a Citation Status MEDLINE
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|a In the first step of the phenylpropanoid metabolic pathway, L-phenylalanine (L-Phe) is deaminated to form E-cinnamate, in a conversion catalyzed by phenylalanine ammonia-lyase (PAL; EC 4.3.1.5). The metabolic fate of the ammonium ion (NH4+) produced in this reaction was investigated in sweet potato (Ipomoea batatas) tuber discs. [15N]-Labeled substrates including L-Phe, in the presence or absence of specific enzyme inhibitors, were administered to sweet potato discs in light under aseptic conditions. 15N-Nuclear magnetic resonance spectroscopic analyses revealed that the 15NH4+ liberated during the PAL reaction is first incorporated into the amide nitrogen of L-glutamine (L-Gln) and then into L-glutamate (L-Glu). These results extend our previous observations in pine and potato that PAL-generated NH4+ is assimilated by the glutamine synthetase (GS; EC 6.3.1.2)/glutamate synthase (GOGAT; EC 1.4.1.13) pathway, with the NH4+ so formed ultimately being recycled back to L-Phe via L-Glu as aminoreceptor and donor
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|a Journal Article
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| 650 |
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a NASA Discipline Plant Biology
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| 650 |
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|a Non-NASA Center
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| 650 |
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|a Enzyme Inhibitors
|2 NLM
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| 650 |
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|a Indans
|2 NLM
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| 650 |
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|a Nitrogen Isotopes
|2 NLM
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| 650 |
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|a Quaternary Ammonium Compounds
|2 NLM
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| 650 |
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|a Ammonium Chloride
|2 NLM
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| 650 |
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|a 01Q9PC255D
|2 NLM
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| 650 |
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|a Glutamine
|2 NLM
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|a 0RH81L854J
|2 NLM
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| 650 |
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|a Glutamic Acid
|2 NLM
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| 650 |
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|a 3KX376GY7L
|2 NLM
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| 650 |
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|a Tyrosine
|2 NLM
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| 650 |
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|a 42HK56048U
|2 NLM
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| 650 |
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|a Phenylalanine
|2 NLM
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| 650 |
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|a 47E5O17Y3R
|2 NLM
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| 650 |
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|a Phenylalanine Ammonia-Lyase
|2 NLM
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| 650 |
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|a EC 4.3.1.24
|2 NLM
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| 650 |
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|a Nitrogen
|2 NLM
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| 650 |
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|a N762921K75
|2 NLM
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| 700 |
1 |
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|a Lewis, N G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Towers, G H
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lewis, N G
|e investigator
|4 oth
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| 773 |
0 |
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|i Enthalten in
|t Journal of plant physiology
|d 1979
|g 153(1998), 3-4 vom: 31. Okt., Seite 316-23
|w (DE-627)NLM098174622
|x 0176-1617
|7 nnns
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| 773 |
1 |
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|g volume:153
|g year:1998
|g number:3-4
|g day:31
|g month:10
|g pages:316-23
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|a GBV_USEFLAG_A
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|a SYSFLAG_A
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|a GBV_NLM
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|a GBV_ILN_350
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|a AR
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|d 153
|j 1998
|e 3-4
|b 31
|c 10
|h 316-23
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