Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

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.

View full-text article in PMC

. 2020 Aug 21;21(17):6038. doi: 10.3390/ijms21176038

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

The electrospray ionization-ion trap (ESI) mass spectra of the [ECA]_n-core OS identified in E. coli R1 LOS preparation obtained for (a) fraction 3 (negative-ion mode) with the Bio-Gel P-10 elution profile as the inset; (b) fraction 4 (negative-ion mode); (c) fraction 5 (negative-ion mode); (d) fraction 5 (positive-ion mode). (e) The positive-ion mode ESI-MS² spectrum of the ion at m/z 839.25 (3+) attributed to [ECA]-core-P₃-Etn glycoform, where core stands for Glc₃-Gal₂-Hep₃-Kdo oligosaccharide. The symbol nomenclature for glycans was used for carbohydrates visual representation: Fucose; Mannuronic acid; N-acetylglucosamine; Glucose; Galactose; l,d-manno-Heptose; Kdo; NAc, N-acetyl group [27]. The interpretation of ions is shown in Table 1. The most informative ions are colored in red. The mark # stands for non-interpreted ions.

Inline graphic — The electrospray ionization-ion trap (ESI) mass spectra of the [ECA]_n-core OS identified in E. coli R1 LOS preparation obtained for (a) fraction 3 (negative-ion mode) with the Bio-Gel P-10 elution profile as the inset; (b) fraction 4 (negative-ion mode); (c) fraction 5 (negative-ion mode); (d) fraction 5 (positive-ion mode). (e) The positive-ion mode ESI-MS² spectrum of the ion at m/z 839.25 (3+) attributed to [ECA]-core-P₃-Etn glycoform, where core stands for Glc₃-Gal₂-Hep₃-Kdo oligosaccharide. The symbol nomenclature for glycans was used for carbohydrates visual representation: Fucose; Mannuronic acid; N-acetylglucosamine; Glucose; Galactose; l,d-manno-Heptose; Kdo; NAc, N-acetyl group [27]. The interpretation of ions is shown in Table 1. The most informative ions are colored in red. The mark # stands for non-interpreted ions.