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. Author manuscript; available in PMC: 2019 Oct 1.
Published in final edited form as: Anal Bioanal Chem. 2018 Jul 31;410(26):6881–6889. doi: 10.1007/s00216-018-1288-z

Fig. 3.

Fig. 3

Fig. 3

Fig. 3

Fig. 3

Fig. 3

Linearity of Des, Isodes and equimolar concentration ratio of Des- Isodes were evaluated using MALDI-MS2 quantification method. Linearity of MS response over the dynamic range from 125 ng/μL to 3.125 ng/μL are shown for- Des (a), Isodes (b), and equimolar concentration ratio of Des: Isodes (c). Linearity of Des was also assessed in biological fluids- serum (d), and urine (e) over the dynamic range from 43.75 ng/μL to 6.25 ng/μL. Various concentrations of Des were mixed with 25 ng/μL of Labeled-Des.