# Protein Sequence Viewer — Instant Protein Information

> Instant Protein Information (iPhone/iPad app by Kazunari Sasaki.)

- Source: https://appshunter.io/ios/app/protein-sequence-viewer/id6758012449 (this page in markdown: same URL + `.md`)
- Developer: [Kazunari Sasaki](https://appshunter.io/developer/1857860050)
- Category: Education, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 25 MB
- Languages: American English
- Released: 2026-01-25
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/protein-sequence-viewer/id6758012449/reviews.md

## What is Protein Sequence Viewer?

Protein Sequence Viewer is an iOS application designed for rapid retrieval of protein sequences (single-letter format) and lengths (amino acids) from UniProtKB/Swiss-Prot (reviewed entries). Simply enter a gene name or UniProt ID (Accession or Entry name) to access the data you need.

Key Features:
Gene name and UniProt ID search (Swiss-Prot reviewed entries only)
Canonical sequence display with isoform switching via dropdown menu
Downloadable offline databases for Human, Mouse, Rat, and Yeast—enabling searches without internet connectivity
Streamlined interface focused on sequences and lengths
One-tap sequence copying to clipboard

Data Source:
All sequence data is retrieved from UniProt.


## Version history (last 3 releases)

### 2.1 — 2026-01-27

Fixed bugs.

### 2.0 — 2026-01-24

各種バグを修正しました。

### 1.0 — 2026-01-23

No release notes.

## More apps by Kazunari Sasaki

- [漢字タワー](https://appshunter.io/ios/app/id6755986175)

All apps by Kazunari Sasaki: https://appshunter.io/developer/1857860050

## Related topics

[protein sequence viewer](https://appshunter.io/ios/topics/protein-sequence-viewer)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*