ExKine™ Nuclei Extraction Kit (KTP4001) — FAQ for Chromatin, Epigenomics, and Nuclear RNA Researchers
ExKine™ Nuclei Extraction Kit: Your Questions Answered
Nuclei isolation is the first step for an enormous range of cell biology applications: in vitro apoptosis assays, transcriptional status analysis, and preparation of chromatin, genomic DNA, histones, and nuclear RNA/RNP[reference:14]. But nuclei are fragile, and the isolation step is where many otherwise well-designed epigenomics experiments quietly fail — nuclei lyse, chromatin shears, and cytoplasmic contamination inflates background.
The ExKine™ Nuclei Extraction Kit (KTP4001) from Abbkine is a rapid nuclei isolation system designed for mammalian cultured cells and homogenate tissues, delivering nuclei in under one hour with a storage buffer that preserves them frozen for months[reference:15]. With 1 publication citing this kit, it is a validated entry point for chromatin and nuclear RNA workflows. Here are the answers to the questions that matter most.
What is the principle of this nuclei extraction kit?
The kit uses a Lysis Buffer (10×) to gently permeabilize the plasma membrane, releasing intact nuclei, which are then recovered by centrifugation and resuspended in Nuclei Storage Buffer[reference:16]. The workflow is performed entirely at 2–8°C with pre-cooled buffers and equipment to minimize nuclear damage and enzymatic degradation[reference:17].
What sample types can I use?
The kit is validated for mammalian cultured cells and homogenate tissues[reference:18]. For solid tissues or fragile nuclei requiring higher purity, the High Purity version (KTP4002) uses a sucrose cushion ultracentrifugation step to strip away contaminating membranes and cytoplasmic components[reference:19].
What is the workflow time?
A typical nuclei isolation with this kit can be easily completed in less than one hour[reference:20] — fast enough to fit into a standard experimental day and to minimize the window for nuclear protease activity.
Can I freeze the isolated nuclei?
Yes. The isolated nuclei can be preserved frozen for several months in the included Nuclei Storage Buffer[reference:21]. This is a critical advantage for batch processing: you can collect nuclei from multiple time points or treatment groups and process them together downstream, reducing batch effects in chromatin and nuclear RNA assays.
What downstream applications is this kit suitable for?
This kit is designed for research use only. Applications include:
- Chromatin accessibility assays (ATAC-seq) — intact nuclei are the required input
- Nuclear RNA and RNP isolation[reference:22]
- Histone and chromatin protein analysis
- Genomic DNA preparation from nuclei
- In vitro apoptosis assays requiring nuclear fractions[reference:23]
- Transcriptional status analysis[reference:24]
What's included in the kit?
| Component | Included |
|---|---|
| Lysis Buffer (10×) | ✅ |
| Nuclei Storage Buffer | ✅ |
A minimal, two-component kit — no multi-buffer assembly required. Stable for at least 12 months at the recommended temperature; shipped with gel pack and blue ice[reference:25].
How should I store and handle the kit?
- Storage: Refer to the individual component list; stable for at least 12 months from shipment[reference:26]
- Shipping: Gel pack with blue ice[reference:27]
- Critical handling: Perform all steps at 2–8°C with pre-cooled buffers and equipment; ensure all solutions are fully defrosted and homogeneous before use[reference:28]
When should I choose KTP4002 instead?
Choose KTP4002 (High Purity) when your downstream application demands >95% nuclear enrichment and you are working with solid tissues or fragile nuclei that require the sucrose cushion ultracentrifugation step to remove membrane and cytoplasmic contaminants[reference:29][reference:30]. For routine cultured-cell nuclei isolation with a sub-one-hour workflow, KTP4001 is the faster, simpler choice.
📌 Reference Link: ExKine™ Nuclei Extraction Kit — KTP4001
