biological pigment
Let an agent explain biological pigments, relay chemistry, functions and examples from biochemistry and biology sources, describe the named pigment classes and flag the luciferin distinction, and distinguish biological pigments from structural colour, synthetic dyes, bioluminescence and food colourings.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain biological pigments, relay chemistry, functions and examples from biochemistry and biology sources, describe the named pigment classes and flag the luciferin distinction, and distinguish biological pigments from structural colour, synthetic dyes, bioluminescence and food colourings.
A substance produced by living organisms that has colour resulting from selective absorption of light, including chlorophylls and carotenoids used in photosynthesis, known as photosynthetic pigments, bilins such as phycobilins and bilirubin, melanins, haem in haemoglobin, pteridines such as sepiapterin, and photopigments such as rhodopsin used in vision; luciferins, including D-luciferin of fireflies, are light-emitting substrates of bioluminescence rather than pigments in the strict sense, and the registry alias DL-sepiapterin names a racemic form of a pteridine.
What it is for: Light harvesting, protection, signalling, vision and camouflage.
It can be explain chemistry and functions; relay examples; describe named classes; distinguish related phenomena.
Distinguishing features
Selective light absorption
Diverse chemistry
Many functions
Distinct from structural colour
What it looks like
Colours of leaves, skin, feathers, blood and flowers.
Physical character
chlorophyll a absorption peaks: about 430 and 662 nm - in solvent, approximate
rhodopsin peak absorption: about 500 nm
registry parent: pigment note
How it is recognised
Coloured substance made by organisms
Bilins, photosynthetic pigment, luciferin, photopigment, DL-sepiapterin, D-luciferin
Structural colour arises from microstructure; synthetic dyes are manufactured; bioluminescence emits light; food colourings may be natural or synthetic
Related models
is a kind of - in registry terms
includes -
includes -
is contrasted with -
In practice
Families and kinds
chlorophylls
carotenoids
bilins
melanins
haem pigments
pteridines and flavonoids
photopigments
Standards and regulation
Food additive rules for natural colourants such as E numbers
Failure modes and hazards
Confusing luciferin with pigments
Confusing pigment and structural colour
Overstating health claims for pigment supplements
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What biological pigments are.
Science.
Definition
Definition.
Definition
Definition.
- What is a biological pigment, and how does it differ from structural colour, synthetic dyes, bioluminescence and food colourings? definition
- Is the question about plants, animals, human health or chemistry? boundary
Named
Named classes.
Named
Named.
- What are bilins, photosynthetic pigments, photopigments and sepiapterin, and why are luciferins different? definition
- Which entry fits the specific pigment? action
Chemistry Chemistry.
Science.
Absorption
Light absorption.
Absorption
Absorption.
- How do conjugated molecules absorb specific wavelengths? provenance
- Which references are standard? provenance
Biosynthesis
Biosynthesis.
Biosynthesis
Biosynthesis.
- How are chlorophylls, carotenoids and melanins made? provenance
- Which sources are cited? provenance
Functions Functions.
Application.
Photosynthesis
Photosynthesis.
Photosynthesis
Photosynthesis.
- How do photosynthetic pigments capture light? provenance
- Which entry fits photosynthesis? action
Vision
Vision.
Vision
Vision.
- How do photopigments such as rhodopsin enable vision? provenance
- Which entry fits rhodopsin? action
Context Health and bioluminescence.
Context.
Health
Human pigments.
Health
Health.
- How are bilirubin and melanin linked to jaundice and skin colour? provenance
- Which entry fits bilirubin? action
Bioluminescence
Luciferins.
Bioluminescence
Bioluminescence.
- How do luciferins produce light in fireflies? provenance
- Which entry fits bioluminescence? action
What the second pass must settle
- Should luciferin be moved to bioluminescence entries?
- How should biochemistry sources be linked?
- Should each pigment class be a separate entry?