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Что (кто) такое NTN - определение
WIKIMEDIA DISAMBIGUATION PAGE
NTN (disambiguation)
NTN
National Telecommunications Network
CX3CL1
PROTEIN-CODING GENE IN THE SPECIES HOMO SAPIENS
Fractalkine; CX3CL; Chemokine ligand 1; ABCD-3; Abcd-3; C3Xkine; C3xkine; CX3CL1 (gene); Neurotactin
Fractalkine, also known as chemokine (C-X3-C motif) ligand 1, is a protein that in humans is encoded by the CX3CL1 gene.
Catalytic triad
![p''K''<sub>a</sub>]] of the nucleophilic residue which then attacks the substrate. An [[oxyanion hole]] of positively charged usually backbone [[amide]]s (occasionally side-chains) stabilise charge build-up on the substrate [[transition state]].](https://commons.wikimedia.org/wiki/Special:FilePath/Triad chemical mech.png?width=200 "p''K''<sub>a</sub>]] of the nucleophilic residue which then attacks the substrate. An [[oxyanion hole]] of positively charged usually backbone [[amide]]s (occasionally side-chains) stabilise charge build-up on the substrate [[transition state]].")
![The range of amino acid residues used in different combinations in different enzymes to make up a catalytic triad for hydrolysis. On the left are the nucleophile, base and acid triad members. On the right are different substrates with the cleaved bond indicated by a pair of scissors. Two different bonds in [[beta-lactam]]s can be cleaved (1 by [[penicillin acylase]] and 2 by [[beta-lactamase]]).](https://commons.wikimedia.org/wiki/Special:FilePath/Triads and their substrates annotated.svg?width=200 "The range of amino acid residues used in different combinations in different enzymes to make up a catalytic triad for hydrolysis. On the left are the nucleophile, base and acid triad members. On the right are different substrates with the cleaved bond indicated by a pair of scissors. Two different bonds in [[beta-lactam]]s can be cleaved (1 by [[penicillin acylase]] and 2 by [[beta-lactamase]]).")
SET OF THREE COORDINATED AMINO ACIDS
Enzyme triad; Active site triad; N-terminal nucleophilic protease; N-terminal nucleophilic; Ntn protease; Catalytic Triad; Catalytic dyad
A catalytic triad is a set of three coordinated amino acids that can be found in the active site of some enzymes. Catalytic triads are most commonly found in hydrolase and transferase enzymes (e.
Википедия
NTN
NTN may refer to:
- NTN (TV channel) (Ukrainian: НТН), Ukraine
- NTN Buzztime, an entertainment company
- NTN Corporation, bearing manufacturer
- National Terminal Number
- New Telemark Norm, a type of ski binding
- Newton railway station, station code "NTN"
- Nike Team Nationals, a cross-country meet
- Normanton Airport, IATA airport code "NTN"
Примеры употребления для NTN
1. Taxpayers without National Tax Number (NTN) are advised to obtain the NTN by submitting an application to the nearest NTN Cell.
2. For many investors, the NTN–Bs have another problem.
3. It is ensured that NTN is issued within 48 hours without fail.
4. Although the requirement of NTN/CNIC is mandatory at the time of tax payment, it has been decided to accept the payment of taxes without NTN/CNIC number uptill 30th June, 2005.
5. Taxpayers are requested to ensure the correctness of their National Tax Number from the nearest NTN Cell located in all major cities or through «On Line NTN Verification» from CBR’s website www.cbr.gov.pk.