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. Author manuscript; available in PMC: 2006 Jan 31.
Published in final edited form as: Anal Chem. 2005 May 15;77(10):3173–3182. doi: 10.1021/ac0482312

Figure 5.

Figure 5

Negative ion mass spectra collected after ubiquitin [U + H]+ ions subjected to reaction with anions derived from carboxylate-terminated polyamidoamine dendrimer generations 0.5 (a), 1.5 (b), 2.5 (c), and 3.5 (d).