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Related Experiment Video

Updated: May 25, 2026

Preparation of Living Isolated Vertebrate Photoreceptor Cells for Fluorescence Imaging

Preparation of Living Isolated Vertebrate Photoreceptor Cells for Fluorescence Imaging

Published on: June 22, 2011

An accessory chromophore in red vision.

T Isayama¹, D Alexeev, C L Makino

¹Department of Ophthalmology, Massachusetts Eye & Ear Infirmary, Boston, Massachusetts 02114, USA.

|October 13, 2006

Summary

Some fish use chlorophyll to see red light in the deep sea. This study shows salamander eye cells can also use chlorophyll derivatives to enhance red light vision, suggesting a general vertebrate photoreception mechanism.

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Area of Science:

Visual Pigments
Photoreception
Chlorophyll Derivatives

Background:

Deep-sea fish lacking red-sensitive visual pigments utilize chlorophyll derivatives to perceive deep-red light.
This adaptation allows vision in environments with limited light spectrum.

Purpose of the Study:

To investigate if vertebrate photoreceptor cells, beyond deep-sea fish, can accumulate exogenous chlorophyll derivatives.
To determine if such accumulation enhances sensitivity to red light in these cells.

Main Methods:

Extraction of living rod cells from salamander eyes.
Incubation of these cells with an exogenous chlorophyll derivative, chlorin e6.
Assessment of the red light sensitivity of the treated rod cells.

Main Results:

Salamander rod cells successfully accumulated the exogenous chlorophyll derivative, chlorin e6.
The chlorophyll-treated cells exhibited enhanced sensitivity to red light, matching their green light sensitivity.
The chlorophyll derivative proved to be unbleachable, indicating sustained light sensitivity.

Conclusions:

Vertebrate photoreceptor cells can be augmented with exogenous chlorophyll derivatives for enhanced spectral sensitivity.
Vision enhancement using unbleachable chlorophyll derivatives may be a widespread phenomenon in vertebrate photoreception.
This finding opens possibilities for understanding and potentially improving vision across different vertebrate species.