# One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes - facts

Canonical page: https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to
Type: Lab article

## TL;DR

TA4C is a small aldehyde reagent that alkylates a protein's N-terminal amine in one aqueous step, labeling the protein and anchoring it to a liposome membrane.

## Facts Index

| Fact ID | Category | Entity | Attribute | Value | Source | Evidence |
|---|---|---|---|---|---|---|
| one-step-n-terminal-tagging-that-anchors-proteins-to:title | identity | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | title | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to |
| one-step-n-terminal-tagging-that-anchors-proteins-to:published | identity | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | published | 2026-08-15 | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to |
| one-step-n-terminal-tagging-that-anchors-proteins-to:author | identity | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | author | PreppinPeppers Editorial Team | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to |
| one-step-n-terminal-tagging-that-anchors-proteins-to:topics | identity | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | topics | peptide research, Research, study | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to |
| one-step-n-terminal-tagging-that-anchors-proteins-to:summary | content | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | summary | TA4C is a small aldehyde reagent that alkylates a protein's N-terminal amine in one aqueous step, labeling the protein and anchoring it to a liposome membrane. | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to |
| one-step-n-terminal-tagging-that-anchors-proteins-to:section-1 | content | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | section | What it is | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to |
| one-step-n-terminal-tagging-that-anchors-proteins-to:section-2 | content | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | section | Why the N-terminus matters | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to |
| one-step-n-terminal-tagging-that-anchors-proteins-to:section-3 | content | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | section | What the numbers say | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to |
| one-step-n-terminal-tagging-that-anchors-proteins-to:section-4 | content | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | section | From model protein to targeting peptide | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to |
| one-step-n-terminal-tagging-that-anchors-proteins-to:section-5 | content | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | section | Bench-side notes for anyone handling these tools | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to |
| one-step-n-terminal-tagging-that-anchors-proteins-to:source-www-biorxiv-org | source | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | cites | this coverage at bioRxiv → - www.biorxiv.org | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.biorxiv.org/content/10.64898/2026.07.31.742023v1?rss=1 |
| one-step-n-terminal-tagging-that-anchors-proteins-to:source-pubmed-ncbi-nlm-nih-gov | source | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | cites | Bergman, EXS 2000: Ladder sequencing - pubmed.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://pubmed.ncbi.nlm.nih.gov/10803376/ |
| one-step-n-terminal-tagging-that-anchors-proteins-to:source-pubmed-ncbi-nlm-nih-gov-2 | source | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | cites | Onoda et al., Chembiochem 2020: Triazolecarbaldehyde Reagents for One-Step N-Terminal Protein Modification - pubmed.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://pubmed.ncbi.nlm.nih.gov/31794069/ |
| one-step-n-terminal-tagging-that-anchors-proteins-to:source-pubmed-ncbi-nlm-nih-gov-3 | source | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | cites | Tong et al., Int J Biol Macromol 2010: Characterization of a monoPEG20000-Endostar - pubmed.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://pubmed.ncbi.nlm.nih.gov/20122957/ |
| one-step-n-terminal-tagging-that-anchors-proteins-to:product-gansulin-metal-peptide-pen | products | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | references product | Gansulin Pen · Reusable Click-Dial, 3 ml (1-60 Units) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/products/gansulin-metal-peptide-pen |
| one-step-n-terminal-tagging-that-anchors-proteins-to:product-gansulin-3ml-cartridge | products | One-Step N-Terminal Tagging That Anchors Proteins to Liposome Membranes | references product | Gansulin-Compatible 3 ml Glass Cartridge for Pens (10-Pack) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/one-step-n-terminal-tagging-that-anchors-proteins-to) | https://www.preppinpeppers.com/products/gansulin-3ml-cartridge |

## FAQ

### What is TA4C and why does it selectively tag the N-terminus?

TA4C is 1H-1,2,3-triazole-4-carbaldehyde. Its aldehyde reacts with the N-terminal α-amino group, which has a lower pKa than lysine side chains and is the most nucleophilic amine at neutral pH, giving site-specific tagging without genetic engineering.

### How efficient is N-terminal alkylation of GFP with TA4C?

The bioRxiv study reports 93% conversion with the hexyl-tailed TA4C reagent and 70% with the nonyl-tailed variant on superfolder GFP, with the longer alkyl chain giving stronger membrane association.

### Can TA4C-alkylated peptides target cancer cells on liposomes?

Yes. N-terminally alkylated GE11 peptide anchored onto liposomes actively bound EGFR-overexpressing A431 cells, demonstrating that the chemistry works for targeted drug-delivery constructs.

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