LEUCINE
LEU, L
CHEMICAL STRUCTURE
CHEMICAL SHIFTS
Standard chemical shifts of random extended chain structures:
 
1Ha 13Ca 15Nb
NH: 8.42 
HA: 4.38
HB: 1.65
HG: 1.64
HD: 0.94, 0.90		 CO: 175.9 
CA: 53.6 
CB:  40.5
CG: 25.2
CD: 23.1, 21.6		 N: 121.8
a) from 86BOOK1: b) from 91JMB311-222
More info in:
  • 1H chemical shifts of amino acids
  • 13C chemical shifts of amino acids
  • Average 1HA, 1HN and 15N chemical shifts in random coil
    • IDENTIFICATION
    Easy spin system identification from:
    SECONDARY STRUCTURE
    Standard average chemical shift values used in determination of secondary structure by means of the CSI method:
    HA: 4.17
    CA: 55.0
    CO: 176.9
    Thus:

              HELIX           B STRAND          COIL
                 CA      CO       CA      CO           CA      CO
                57.8    178.5     53.9    175.5      55.7    176.9

    More info in: 13CA and 13CO chemical shifts according to secondary structure.

    OBSERVATIONS
     
    RELATED TOPICS