Beijing Liuyi DYCZ-25E P4 Vertical Electrophoresis Apparatus (Model 121-2550)

Overview

The Beijing Liuyi DYCZ-25E P4 Vertical Electrophoresis Apparatus (Model 121-2550) is a compact, high-reproducibility vertical electrophoresis system engineered for analytical and preparative protein separation via polyacrylamide gel electrophoresis (PAGE) and isoelectric focusing (IEF). Designed around the principle of controlled electric field-driven migration of charged biomolecules through a porous polyacrylamide matrix, this apparatus supports both standard SDS-PAGE and native IEF applications. Its integrated casting-and-running architecture eliminates gel transfer steps, minimizing handling-induced artifacts and enabling precise control over polymerization conditions—critical for reproducible band resolution and molecular weight estimation. The unit operates under constant voltage mode, delivering stable field strength across multiple gels simultaneously, with typical run completion in 25 minutes at 300 V under standard PAGE conditions.

Key Features

• Modular High-Throughput Design: Accommodates 1–4 vertical gels per run using dual independent electrophoresis chambers; each chamber supports two 100 × 85 mm gel plates.
• Optimized Glass Plate Assembly: Sealing spacers are permanently affixed to glass plates, eliminating fragile concave glass configurations and reducing breakage risk during assembly and handling.
• In-Situ Gel Casting: Gel cassettes mount directly onto the electrophoresis core; paired glass plates self-align upon insertion, ensuring consistent gap uniformity and eliminating manual alignment errors.
• High Experimental Reproducibility: Simultaneous casting and electrophoresis of up to four gels under identical buffer composition, temperature, and voltage conditions ensures inter-gel comparability required for quantitative densitometry or comparative proteomics workflows.
• Ergonomic & Error-Proof Assembly: Precision-machined locating features and tactile feedback guides ensure correct orientation and seating of combs, spacers, and gel cassettes—no tools or prior training required.
• Durable Polycarbonate Construction: Entire housing and buffer chamber fabricated from high-impact, UV-transparent polycarbonate (PC), offering chemical resistance to common electrophoresis buffers (e.g., Tris-Glycine, Tris-Acetate), mechanical stability, and real-time visual monitoring of electrophoretic front progression.

Sample Compatibility & Compliance

The DYCZ-25E P4 accommodates standard vertical polyacrylamide gels ranging from 8% to 20% T (total acrylamide concentration) and 2.6% to 6.6% C (crosslinker ratio), compatible with Laemmli, discontinuous, and gradient gel systems. It supports both mini-gel formats (100 × 85 mm) and standard comb configurations—including 13- and 21-well options at 1.0 mm and 1.5 mm thicknesses—for optimal sample loading flexibility. The system complies with fundamental safety requirements for low-voltage (< 600 V) laboratory electrophoresis equipment per IEC 61010-1. While not certified for GMP production environments, its design supports GLP-aligned documentation practices including batch-specific run logs, buffer lot tracking, and operator identification—facilitating audit readiness for academic, clinical research, and contract testing laboratories.

Software & Data Management

As a standalone benchtop electrophoresis apparatus, the DYCZ-25E P4 does not incorporate embedded digital controls or data logging hardware. Operation is fully manual, requiring external power supply (e.g., Beijing Liuyi DYY-6C or equivalent constant-voltage source). However, its standardized gel dimensions and consistent run parameters enable seamless integration with third-party imaging systems (e.g., Bio-Rad ChemiDoc, Azure Biosystems Sapphire) and quantification software (ImageLab, ImageJ/Fiji, AlphaView SA). Users may implement electronic lab notebook (ELN) protocols to record voltage, time, buffer composition, and gel lot numbers—supporting traceability in accordance with ISO/IEC 17025 clause 7.7 (result reporting) and FDA 21 CFR Part 11 principles when paired with validated ELN platforms.

Applications

• SDS-PAGE analysis of purified proteins, cell lysates, and immunoprecipitated complexes
• Isoelectric focusing for pI determination and charge heterogeneity assessment of recombinant antibodies and post-translationally modified proteins
• Two-dimensional electrophoresis (2-DE) first-dimension IEF followed by second-dimension SDS-PAGE
• Quality control of protein expression systems (E. coli, yeast, mammalian cell lines)
• Stability-indicating assays for biopharmaceuticals under thermal or chemical stress conditions
• Teaching laboratory instruction in molecular biology, biochemistry, and proteomics

FAQ

What power supply is required to operate the DYCZ-25E P4?
A constant-voltage DC power supply capable of delivering up to 600 V and 500 mA is recommended; compatibility with Beijing Liuyi DYY-6C, DYY-7C, or equivalent commercial units is confirmed.
Can this system be used for native PAGE?
Yes—the absence of denaturing agents in the gel matrix and running buffer allows native conformational analysis of multimeric proteins, enzymes, and nucleoprotein complexes.
Is the buffer tank resistant to SDS and urea?
Yes; the polycarbonate construction exhibits excellent resistance to SDS (≤10%), urea (≤8 M), and common Tris-based electrophoresis buffers across pH 6.8–8.8.
How is temperature managed during extended runs?
Passive heat dissipation is enabled by the large surface-area-to-volume ratio of the buffer reservoir and transparent PC housing; for runs exceeding 45 minutes or at voltages >400 V, supplemental cooling (e.g., circulating cold water jacket or chilled buffer recirculation) is advised.
Are replacement parts available internationally?
Glass plates, combs, sealing spacers, and gasket kits are supplied as OEM components through authorized global distributors and support full interchangeability with legacy DYCZ-series units.