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. 2011 Jan 4;108(5):1794–1798. doi: 10.1073/pnas.1017317108

Table 1.

Fractional populations of the three backbone conformations obtained by fitting Raman and ATR-absorbance spectra

Infrared Raman
f(PII) f(αR) f(β) f(PII) f(αR) f(β)
Gly 0.22 0.66 0.12 0.22 0.63 0.15
Ala 0.60 0.11 0.29 0.62 0.09 0.29
Lys 0.55 0.04 0.41 0.54 0.05 0.41
Arg 0.54 0.07 0.39 0.53 0.06 0.41
Leu 0.55 0.10 0.35 0.56 0.10 0.34
Trp 0.54 0.02 0.44
Met 0.50 0.03 0.47 0.53 0.04 0.43
Ser 0.49 0.04 0.47 0.50 0.04 0.46
Glu0 0.47 0.05 0.48 0.46 0.05 0.49
Glu- 0.59 0.05 0.36
Gln 0.44 0.08 0.48
Tyr 0.46 0.07 0.47 0.46 0.07 0.47
Phe 0.45 0.06 0.49
Val 0.47 0.02 0.51 0.47 0.02 0.51
Cys 0.43 0.03 0.54 0.41 0.04 0.55
Ile 0.46 0.02 0.52 0.46 0.02 0.52
Thr 0.39 0.03 0.58 0.39 0.05 0.56
Asn 0.40 0.02 0.58 0.38 0.03 0.59
Asp0 0.43 0.02 0.55
Asp- 0.49 0.05 0.46
His 0.38 0.04 0.58 0.39 0.04 0.57

Glu- and Asp- are measured at pH 4.9, and Glu0 and Asp0 are measured at pH 2.9.