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[Question from NMRWiki Q&A forum] Measurement of 13C enrichment

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NMR processing:

MDD

NMR assignment:

Backbone:

Side-chains:

NOEs:

Structure from NMR restraints:

Ab initio:

Fragment-based:

Rosetta-NMR (Robetta)

Template-based:

GeNMR

I-TASSER

Refinement:

Amber

Structure from chemical shifts:

Fragment-based:

Homology-based:

Torsion angles from chemical shifts:

Preditor

TALOS

Promega- Proline

Secondary structure from chemical shifts:

CSI (via RCI server)

TALOS

MICS caps, β-turns

d2D

PECAN

Flexibility from chemical shifts:

RCI

Interactions from chemical shifts:

HADDOCK

Chemical shifts re-referencing:

NMR model quality:

NOEs, other restraints:

Chemical shifts:

RDCs:

Pseudocontact shifts:

Protein geomtery:

SAVES2 or SAVES4

Quality Control Check

NMR spectrum prediction:

FANDAS

MestReS

V-NMR

Flexibility from structure:

Backbone S2

Methyl S2

B-factor

Molecular dynamics:

Gromacs

Amber

Antechamber

Chemical shifts prediction:

From structure:

Shiftx2

Sparta+

Camshift

CH3shift- Methyl

ArShift- Aromatic

ShiftS

Proshift

PPM

CheShift-2- Cα

From sequence:

Shifty

Camcoil

Poulsen_rc_CS

Disordered proteins:

MAXOCC

Format conversion & validation:

CCPN

From NMR-STAR 3.1

Validate NMR-STAR 3.1

NMR sample preparation:

Protein disorder:

DisMeta

Protein solubility:

Isotope labeling:

Solid-state NMR:

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10-21-2015, 12:49 PM

nmrlearner

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Measurement of 13C enrichment

Measurement of 13C enrichment

I am wondering, is it possible for me to measure 13C enrichment in my compound by using 1D 13C NMR spectrum? Id ran standard (13C at natural abundance) and also my sample (impregnated with 13C). From the 1D 13C NMR spectra produced, my sample (impregnated with 13C) show higher intensity of C signal compared to the standard (13C at natural abundance). My sample is crude extract, and I already identify compounds (amino acids) present in my sample via TOCSY and their J-value. The issue here, how can I measure the impregnated 13C in my compound? Is it necessary for me to do integration and how?

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