# Thermo LTQ XL — pure linear ion trap

**Instrument:** Thermo Scientific **LTQ XL** — stand-alone **linear (2D) ion trap**, unit
resolution (NOT an Orbitrap hybrid). In-file cvParams: `LTQ XL` + `radial ejection linear ion
trap`, with no Orbitrap/FT analyzer present.
**New axis:** first **pure ion-trap** analyzer in the corpus — low-resolution unit-mass MS/MS.
**Source:** PRIDE / ProteomeXchange **PXD059878** (KAT5/PC4 acetylation & DNA repair).
**URL:** https://ftp.pride.ebi.ac.uk/pride/data/archive/2025/10/PXD059878/2013_30_Amrutha_050713_1.mzML
**License:** ProteomeXchange open-access · public, no login.
**Reconstructed by:** `scripts/fetch-mzml-examples.sh` (this directory is git-ignored).

## Files

| File | Bytes | Role |
|---|--:|---|
| `2013_30_Amrutha_050713_1.mzML` | 181,980,315 | indexed mzML (pure linear ion trap) |

See [`docs/mzml-examples.md`](../../../docs/mzml-examples.md) for the full corpus inventory.