Table 1

Geometric parameters of guanine crystals in Phelsuma species
Species (individual) Green/blue White Red
Orientation A/y0 (FWHM)a Crystal height, nmb Crystal spacing, nmb Orientation A/y0 (FWHM) Crystal height, nm Crystal length, nm Orientation A/y0 (FWHM) Crystal height, nm Crystal length, nm
P. grandis (1) 15.0 (32°) 80.8 ± 12.2/ 78.5 ± 10.9c 96.0 ± 20.8/ 104.7 ± 25.5c 2.7 (72°) 84 ± 44 173 ± 84 1.3 (82°) 68 ± 34 128 ± 70
P. grandis (2) 9.7 (49°) 81.0 ± 12.9 84.9 ± 22.7 2.0 (61°) 78 ± 39 169 ± 96 1.1 (53°) 67 ± 33 124 ± 82
P. grandis (3) 13.0 (47°) 79.4 ± 10.7 99.2 ± 10.6 2.6 (59°) 75 ± 36 171 ± 91 1.7 (46°) 71 ± 37 130 ± 73
P. laticauda 13.3 (39°) 82.5 ± 11.4 97.3 ± 12.6 2.2 (60°) 71 ± 41 194 ± 140 2.6 (61°) 75 ± 42 154 ± 87
P. quadriocellata 20.3 (40°) 70.0 ± 22.7 37.9 ± 13.8 6.4 (49°) 84 ± 42 209 ± 126 4.8 (67°) 69 ± 41 171 ± 103
P. klemmeri 9.6 (32°) 68.0 ± 10.8 93.2 ± 26.3 4.5 (58°) 72 ± 47 265 ± 209 NAd NAd NAd
P. lineata 6.9 (42°) 74.0 ± 11.1 109.6 ± 21.8 4.8 (50°) 94 ± 57 226 ± 137 2.1 (58°) 68 ± 43 170 ± 107

aThe ratio A/y0 and the full-width half maximum (FWHM) of the Gaussian curve describe the crystal orientation relative to the skin surface (see Methods).

bMean ± standard deviation are given for crystal height and spacing between layers of well-organized crystals in green and blue skin, and for crystal height and length in white and red skin. Note that the parameters describing crystal orientation differ substantially between blue/green and white/red skin.

cThe two numbers shown for crystal height and spacing of green/blue skin in P. grandis individual 1 correspond to samples taken from the back and the neck (blue and yellowish-green, respectively; see Figure 4b). Note that the spacing between crystal layers is substantially larger in the neck sample. Additional data are provided for blue and green skin samples, including a comparison of the simulated colors to the real colors seen in the skin after pigment removal (see Additional file 2: Table S3).

dNA, data not available because of the absence of red skin in P. klemmeri.

Saenko et al.

Saenko et al. BMC Biology 2013 11:105   doi:10.1186/1741-7007-11-105

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