Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| MS | MMAE | |
|---|---|---|
| m/z | ||
| (a) | ||
| [M + H]+ | 718.4 | |
| [M + Na]+ | 740.4 | |
| [M + K]+ | 756.4 | |
| (b) | ||
| Precursor ion | [M + H]+ | 321.2 |
| 506.3 | ||
| 687.4 | ||
| [M + Na]+ | 496.3 | |
| 682.3 | ||
| 722.4 | ||
| [M + K]+ | 512.2 | |
| 544.3 | ||
| 698.3 | ||
(a) The three positive-ion peaks derived from MMAE were observed by MS analysis: single-charge hydrogen and sodium and potassium adducts, denoted as [M + H]+, [M + Na]+, and [M + K]+, respectively. (b) MS/MS fragments of MMAE determined from each of the three positive-ion peaks of MMAE.
