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Terahertz absorption of antibodies in 50% glycerol solutions at 0.45 THz. The line with solid green squares represents the fluorescein conjugated IgG (FITC-IgG) and the line with red hollow squares represents the peroxidase conjugated IgG (PX-IgG). The lines are fitted to highlight the linear behavior when the concentration changed from 0.16 to 0.56 mg/ml. The error bars are the 95% confidence intervals.
