First-pass extracted concept

human opsins

Candidate: concept label1 source documents4 linked claims

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Aliases

cone opsins, melanopsin, rhodopsin

Evidence Snippets

This review synthesizes preclinical and clinical evidence comparing microbial actuators with human opsins (rhodopsin, cone opsins, melanopsin).

Evidence 1Source 1DOI PubMedprovenance

Supporting Sources

Source 1primary paper2025MEDDOI PubMed

1 evidence snippet 4 linked claims Claim 1 Claim 2 Claim 3

Linked Claims

Claim 1comparative mechanismsupports2025Source 1DOI PubMed

Mammalian opsins confer bleaching-based light adaptation, whereas microbial tools are photocyclic and can desensitize under steady illumination, limiting sustained contrast encoding.

Claim 2comparative performancesupports2025Source 1DOI PubMed

Human opsins can operate at room-light levels because they activate G-protein-coupled cascades with intrinsic signal amplification, whereas channelrhodopsins typically require much higher irradiance.

Claim 3functional propertysupports2025Source 1DOI PubMed

Rhodopsin and medium-wave cone opsin preserve photopic-range sensitivity, with rhodopsin showing greater sensitivity than cone opsin, while delivering millisecond-scale kinetics and adaptation across backgrounds.

Claim 4functional tradeoffsupports2025Source 1DOI PubMed

Melanopsin provides durable irradiance coding but has slow dynamics.