Dino-Lite AM4517MT-GRFBY EDGE PLUS with 465/580 nm switchable excitation and dual-band 505-535/610-650 nm emission filter: When GFP + mCherry multiplex-stained cells need to be visualized SEQUENTIALLY in green AND red on the same instrument

Published July 16, 2026 at 09:27

Modern cell biology and molecular medicine rely on MULTIPLEX FLUORESCENCE: multiple proteins of interest are labeled with different color fluorophores in the same cell, and visualized SIMULTANEOUSLY (or in rapid sequence) to study how the proteins interact spatially.

Standard multi-color schemes:

• Two colors: GFP (green, ex 488 nm) + mCherry (red, ex 587 nm).
• Three colors: DAPI (blue nuclei) + GFP (green) + mCherry (red).
• Four colors: DAPI + GFP + mCherry + Cy5 (deep red).
• Five-and-more: DAPI + GFP + Alexa 546 + mCherry + Cy5 + Cy7.

Imaging several colors simultaneously requires the fluorescence microscope to have the correct EXCITATION and EMISSION filters for each color. Traditionally, this means either:

1. A microscope with MULTIPLE filter cubes, mechanically ROTATED between different colors.
2. A CONFOCAL microscope with multi-laser + spectrally agile emission system (SEK 500,000-2,000,000).

The Dino-Lite AM4517MT-GRFBY solves the problem with a physically clever design: DUAL-BANDPASS emission filter + switchable dual excitation. A single instrument, the entire multiplex workflow.

Dual-bandpass emission filter — the key innovation

Emission filters are critical for fluorescence microscopy: they BLOCK excitation light (which is millions of times stronger than fluorescence emission) and let through only the emission wavelength.

Standard single-band filters (such as the 480/510 filter described on o-se) let through only ONE emission wavelength (typically 505-540 nm for GFP).

Dual-bandpass filters let through TWO separate wavelength ranges SIMULTANEOUSLY:

• 505-535 nm: GREEN emission (GFP, FITC, Alexa 488, Fluo-4).
• 610-650 nm: RED emission (mCherry, Alexa 594, TRITC, Cy3.5).

This means the sensor can capture BOTH colors in the same image — provided both excitation lights are on simultaneously.

Switchable dual excitation, 465 nm + 580 nm

Complementary component: two separate LED sets for excitation:

• 465 nm blue LEDs: Optimal for GFP excitation (peak 488 nm).
• 580 nm yellow-green LEDs: Optimal for mCherry excitation (peak 587 nm).

Software-controlled switching:

Mode 1: GFP-only: Turn on the 465 nm LEDs. mCherry is not excited (outside its absorption band). The sensor sees only green emission through the 505-535 nm portion of the dual filter.

Mode 2: mCherry-only: Turn on the 580 nm LEDs. GFP is not excited. The sensor sees only red emission through the 610-650 nm portion.

Mode 3: Both simultaneously (merged): Both LED sets on. The sensor captures ALL fluorophores at once. Depending on exposure time, the image can appear as a blended ”yellow-orange” or be separated via post-processing.

32 intensity levels per LED set

Each LED set has 32 intensity levels, software-controlled. This enables:

• Balanced exposure: GFP is typically BRIGHTER (higher intensity per fluorophore) than mCherry. By reducing the 465 nm intensity to 20% and increasing the 580 nm to 100%, the operator can balance the signals.
• Photobleaching management: Prolonged excitation permanently bleaches fluorophores. With lower-intensity excitation, sample lifetime is extended.
• Background optimization: At low signal levels, intensity can be increased to improve signal-to-noise.

Application scenarios: multiplex cell biology

Scenario 1: Cancer research (protein colocalization)

• Protein A (tumor suppressor): labeled with GFP, appears green.
• Protein B (oncogene): labeled with mCherry, appears red.
• Question: do A and B colocalize (in the nucleus, in mitochondria)?
• The AM4517MT-GRFBY switches between green and red images + possible image overlay in software.

Scenario 2: Neurobiology

• Neuronal cell body: labeled with GFP (via viral transfection).
• Ca²⁺ signaling: mCherry-based Ca²⁺ indicator (RCaMP).
• Real-time imaging of neuronal activity via Ca²⁺ transients.

Scenario 3: Stem cell research

• Differentiation marker 1: GFP.
• Differentiation marker 2: mCherry.
• Mapping cellular subtypes in a heterogeneous culture.

Scenario 4: Immunology

• T-cell marker (CD3): FITC antibody (green).
• B-cell marker (CD19): Alexa 594 antibody (red).
• Multi-immune-cell typing in tissue samples.

Optical channel crosstalk

A critical design challenge: how is it ensured that the red signal does NOT show up in the green channel and vice versa?

Spectrally selective LEDs: The 465 nm LEDs have a narrow spectral spread (~15 nm full width at half maximum). This means only GFP is excited — not mCherry (which requires 580 nm).

Dual-filter design: Filters are designed with SHARP transitions between the 535 nm and 610 nm regions. No ”leakage” between the green and red channels.

Sensor linear response: A standard CMOS sensor is sensitive from roughly 400 to 700 nm in an approximately linear fashion — with no built-in color discrimination. Discrimination happens via optical filters, not sensor selectivity.

Trade-offs: single-band vs. dual-band

Advantages of dual-band (this AM4517MT-GRFBY):

• Multi-color imaging in one device.
• No mechanical filter rotation.
• Fast switching (software, <100 ms).
• Cost-effective compared to multi-filter microscopes.

Disadvantages:

• Somewhat lower signal-to-noise vs. a dedicated single-band instrument (each band is narrower in a dual filter).
• No simultaneous capture (simultaneous imaging) — only sequential switching.
• Fixed filter set: cannot be adapted for alternative color combinations (e.g., GFP + Cy5 would not work with this specific filter set).

Multi-color fluorescence schemes compatible with the AM4517MT-GRFBY

The filter set (505-535 green / 610-650 red) works for these fluorophore combinations:

DOES NOT WORK: GFP + Cy5 (Cy5 emission is 660-720 nm, outside the 610-650 nm band).

DOES NOT WORK: DAPI + GFP + mCherry (DAPI has blue emission, outside both bands — requires a separate instrument).

Applications

Basic research — cell biology: Standard tool for multi-protein localization in cells.

Cancer research: Oncogene/suppressor colocalization.

Neurobiology: Simultaneous activity + morphology imaging.

Stem cell research: Differentiation marker panels.

Immunology: Multi-cell-type phenotyping in tissue.

Molecular biology: Gel electrophoresis analysis with multi-color readout.

Pharmacology: Drug screening with multi-target reporter measurement.

Education: University cell biology lab demonstrations of multiplex techniques.

Specifications

• Model: Dino-Lite AM4517MT-GRFBY EDGE PLUS.
• Sensor: 1.3 MP CMOS, 30 fps, 1280×960.
• Excitation LEDs: 465 nm (blue) + 580 nm (yellow-green). Switchable via software.
• Intensity control: 32 levels per LED set.
• Emission filter: dual-bandpass 505-535 nm + 610-650 nm.
• Automatic magnification reading (AMR).
• Housing: anodized aluminum (EMI shielding).
• Connection: USB.
• Software: DinoCapture (included).

What you get for the money

Dino-Lite AM4517MT-GRFBY EDGE PLUS dual-color fluorescence microscope, 1.3 MP CMOS sensor with high sensitivity, switchable excitation 465 nm (GFP) + 580 nm (mCherry) with 32 intensity levels, dual-bandpass emission filter 505-535 nm (green) + 610-650 nm (red), automatic magnification reading, anodized aluminum housing for EMI shielding. SEK 12,639.

The standard tool for basic research in cell biology, cancer research, neurobiology, stem cell research, immunology, molecular biology and pharmacology where multi-color fluorescence imaging is required. The premium over single-band fluorescence is dramatically justified when samples are multi-tagged — instead of switching between two separate instruments (green + red), the AM4517MT-GRFBY is all you need.

Read more: Dino-Lite AM4517MT-GRFBY dual-fluorescence in the shop →