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Photosystem II

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Photosystem II is a molecular complex associated with pigments and electron carriers. In chloroplasts and cyanobacteria it uses light to transfer electrons from water to plastoquinone.

[1] [2]
Evidence for this statement

Source-based explanation

D1 and D2 form a pair of reaction-centre proteins. UniProt connects Arabidopsis D1 to gene psbA and locus AtCg00020. A photosystem complex and one protein are distinct scientific objects.

[1] [2]
Evidence for this statement

Source-based explanation

In entry P83755, the function and location carry evidence code ECO:0000255 and HAMAP rule MF_01379. This is a model-based annotation, not a direct measurement of the pictured plant.

[1] [2]
Evidence for this statement

Source-based explanation

Connected concepts

D1 protein · PsbA

P83755 is the photosystem II D1 protein record for Arabidopsis thaliana, NCBI Taxonomy 3702. The retained UniProt version identifies psbA / AtCg00020 and a sequence of 353 amino acids.

[2]
Evidence for this statement

Source-based explanation

Chloroplast

A chloroplast is a chlorophyll-containing plastid. It contains thylakoids and stroma, with some thylakoids organised into stacks called grana.

[3] [4] [2]
Evidence for this statement

Source-based explanation

Continue with an organism

The photographs and molecular record come from separate source materials.

Norway spruce →Arabidopsis thaliana →

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Sources and versions

An explanation grounded in the cited sources

  1. GO:0009523 · photosystem II

    2026-09-09T01:17:35.068503+00:00 · CC-BY-4.0

    Provenance and original
    Original SHA-256
    56537702684f4e6949eb9b16430a8830740bc9fd3369b21e7b5a9b711a341b4f
    Processing
    Unmodified provider response; article text is an attributed educational summary.
    Version details
    QuickGO response did not supply a native ontology release; retrieval time and exact response hash retained.

    View original JSON · Download original

  2. UniProt P83755 · entry 161 / sequence 2

    2026-09-09T01:17:34.554931+00:00 · CC-BY-4.0

    Provenance and original
    Source version
    entry 161; sequence 2
    Original SHA-256
    f16a5f33fbf85a12aa5c91ab31f6092f0bbe3be874040c84c4954e87b20ae3a9
    Processing
    Unmodified provider response; article text is an attributed educational summary.
    Version details
    Provider entry/sequence versions retained.

    View original JSON · Download original

  3. GO:0009507 · chloroplast

    2026-09-09T01:17:34.931415+00:00 · CC-BY-4.0

    Provenance and original
    Original SHA-256
    13082607c7dcc9e92cd281f1fc6a8fdf2878bceba74e9d7b6ad50d43b0ce33ba
    Processing
    Unmodified provider response; article text is an attributed educational summary.
    Version details
    QuickGO response did not supply a native ontology release; retrieval time and exact response hash retained.

    View original JSON · Download original

  4. Arabidopsis thaliana, first leaf of control seedling grown without added NaCl; Figure 3A

    Retrieval date unknown · CC BY 4.0

    Provenance and original
    Original SHA-256
    fe305c7d3a3327a06dda04c186989b5b8b6dec101bfe13aa851a3bc47dc07b14
    Processing
    Panel A extracted; original g/t annotations and 1 µm scale retained; encoded as WebP.
Inspect structured data
Content version
7d970ab274948da6bd39ed874e6579f5fc17472ed378115b5e03998261ca0c13
Source version
knowledge-20260909.1
Updated
2026-09-09