Table 1. Chemical profiles.
| BGC type I | BGC type II | BGC type III | BGC type IV | |
| ICP-OES | K | Si | Ba | |
| Mn | Cu | |||
| Ca | Fe | |||
| P | ||||
| Zn | ||||
| FT-IR | RC = O(1722–1647) | C-H (3037–2864) | ||
| C = C or C-H orRS = O (879–849) | O-H (3356–3055) | |||
| 1H-NMR | Phe (7.41, 7.39,7.37, 7.35, 7.33) | 7.94 | 7.96 | protein |
| Tyr 7.19 | 7.70 | 7.84 | formate 8.45 | |
| Ser (4.00, 3.94,3.83) | 7.56 | Phe 7.31 | ||
| lactate (4.12,4.10, 1.32, 1.30) | 7.04 | Ser (4.03, 3.92, 3.80) | ||
| Lys or Ala 3.72 | pyroglutamate (4.16, 2.50, 2.47, 2.44, 2.34, 2.09, 2.07, 2.04,2.02, 2.00) | |||
| Gly 3.55 | Ala or Lys 3.69 Lys (3.75, 3.09) | |||
| Lys (3.06, 3.04,3.01, 1.94) | Ala (3.67, 1.44) | |||
| pyroglutamate2.41 | Gly (3.58, 3.51) | |||
| Ala (1.49, 1.46) | ketone (1.59, 1.57) | |||
| 7.84 | amine or formaldehydel or methanol (3.38, 3.34) | |||
| 7.09 | Val (1.10, 1.08) | |||
| 6.65 | 8.08 7.94 7.91 7.87 7.817.79 7.56 | |||
| 7.22 7.07 7.04 7.02 4.08 4.06 3.90 | ||||
| 3.87 3.78 3.65 3.63 3.60 3.48 3.45 | ||||
| 3.42 3.40 3.32 3.28 3.26 3.22 3.20 | ||||
| 3.17 3.13 2.99 2.96 2.93 2.91 2.88 | ||||
| 2.85 2.81 2.77 2.75 2.69 2.67 2.64 | ||||
| 2.62 2.60 2.57 2.54 2.30 2.28 2.26 | ||||
| 2.22 2.20 2.16 2.12 1.89 1.86 1.84 | ||||
| 1.82 1.80 1.78 1.76 1.74 1.72 1.68 | ||||
| 1.66 1.64 1.62 1.53 1.51 1.41 1.39 | ||||
| 1.37 1.35 1.28 1.26 1.23 1.21 1.18 | ||||
| 1.16 1.13 0.92 0.89 0.87 0.84 0.82 | ||||
| 0.80 0.78 |
The chemical profile for the BGC types were divided by ICP-OES, FT-IR and 1H-NMR variables (omitted groups of variables are those with no high positive statistical dependence for the BGC type). Variables for ICP-OES are elements. Variables for FT-IR are the integrated area corresponding to the chemical bond in interval of wavelength (cm−1) showed in parentheses. Variables for 1H-NMR are the integrated area for the buckets (chemical shifts) in ppm; values in parentheses are chemical shifts assigned to the same compound or organic function.