Component
Nω-Hydroxy-L-arginine
Study-scoped entity; inspect species, exposure and experimental limitations on each claim.
3 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What it acts on
The second oxygenation yielded NO and citrulline and required added NADPH and calcium/calmodulin.
Experimental context and source evidence
- evidence_access
- Primary abstract
- experimental_model
- Rat cerebellar NOS preparation; separated partial reactions.
- limitations
- Purified preparation; residual enzyme reductant supported a limited first reaction without added NADPH. This does not imply physiological NOS is NADPH independent.
- nutrient_topic
- L-Arginine collection; tissue, species, dose and formulation distinctions retained. · L-Arginine
- plain_language
- The next reaction produces the signal and recycles the carbon skeleton.
- primary_references
- Characteristics of the nitric oxide synthase-catalyzed conversion of arginine to N-hydroxyarginine, the first oxygenation step in the enzymic synthesis of nitric oxide. · 1995 · https://pubmed.ncbi.nlm.nih.gov/7530247/ · DOI 10.1074/jbc.270.4.1721
L-Arginine: transport, metabolic branches, nutrient interactions, availability and discovery questions (2026-09-18) · lines 78–84
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Rat cerebellar NOS preparation; separated partial reactions. · source_derived_draft · unverified_draft
## arg-nos-second The next reaction produces the signal and recycles the carbon skeleton. The second oxygenation yielded NO and citrulline and required added NADPH and calcium/calmodulin. Model: Rat cerebellar NOS preparation; separated partial reactions. Limitations: Purified preparation; residual enzyme reductant supported a limited first reaction without added NADPH. This does not imply physiological NOS is NADPH independent. Evidence access: Primary abstract Characteristics of the nitric oxide synthase-catalyzed conversion of arginine to N-hydroxyarginine, the first oxygenation step in the enzymic synthesis of nitric oxide. · 1995 · https://pubmed.ncbi.nlm.nih.gov/7530247/ · DOI 10.1074/jbc.270.4.1721
Complete structured claim and evidence
What acts on it
NOS converted arginine to N-hydroxyarginine in an oxygen- and calcium/calmodulin-dependent partial reaction.
Experimental context and source evidence
- evidence_access
- Primary abstract
- experimental_model
- Rat cerebellar NOS preparation; separated partial reactions.
- limitations
- Purified preparation; residual enzyme reductant supported a limited first reaction without added NADPH. This does not imply physiological NOS is NADPH independent.
- nutrient_topic
- L-Arginine collection; tissue, species, dose and formulation distinctions retained. · L-Arginine
- plain_language
- Nitric-oxide production passes through a distinct intermediate.
- primary_references
- Characteristics of the nitric oxide synthase-catalyzed conversion of arginine to N-hydroxyarginine, the first oxygenation step in the enzymic synthesis of nitric oxide. · 1995 · https://pubmed.ncbi.nlm.nih.gov/7530247/ · DOI 10.1074/jbc.270.4.1721
L-Arginine: transport, metabolic branches, nutrient interactions, availability and discovery questions (2026-09-18) · lines 70–76
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Rat cerebellar NOS preparation; separated partial reactions. · source_derived_draft · unverified_draft
## arg-nos-first Nitric-oxide production passes through a distinct intermediate. NOS converted arginine to N-hydroxyarginine in an oxygen- and calcium/calmodulin-dependent partial reaction. Model: Rat cerebellar NOS preparation; separated partial reactions. Limitations: Purified preparation; residual enzyme reductant supported a limited first reaction without added NADPH. This does not imply physiological NOS is NADPH independent. Evidence access: Primary abstract Characteristics of the nitric oxide synthase-catalyzed conversion of arginine to N-hydroxyarginine, the first oxygenation step in the enzymic synthesis of nitric oxide. · 1995 · https://pubmed.ncbi.nlm.nih.gov/7530247/ · DOI 10.1074/jbc.270.4.1721
Complete structured claim and evidence
Where it participates (unsigned role)
BH4 stimulated both partial reactions; the first increased approximately threefold.
Experimental context and source evidence
- evidence_access
- Primary abstract
- experimental_model
- Rat cerebellar NOS preparation; separated partial reactions.
- limitations
- Assay-specific stimulation, not a dietary BH4 or arginine treatment rule.
- nutrient_topic
- L-Arginine collection; tissue, species, dose and formulation distinctions retained. · L-Arginine
- plain_language
- Substrate availability and cofactor availability are separate requirements.
- primary_references
- Characteristics of the nitric oxide synthase-catalyzed conversion of arginine to N-hydroxyarginine, the first oxygenation step in the enzymic synthesis of nitric oxide. · 1995 · https://pubmed.ncbi.nlm.nih.gov/7530247/ · DOI 10.1074/jbc.270.4.1721
L-Arginine: transport, metabolic branches, nutrient interactions, availability and discovery questions (2026-09-18) · lines 86–92
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Rat cerebellar NOS preparation; separated partial reactions. · source_derived_draft · unverified_draft
## arg-nos-bh4 Substrate availability and cofactor availability are separate requirements. BH4 stimulated both partial reactions; the first increased approximately threefold. Model: Rat cerebellar NOS preparation; separated partial reactions. Limitations: Assay-specific stimulation, not a dietary BH4 or arginine treatment rule. Evidence access: Primary abstract Characteristics of the nitric oxide synthase-catalyzed conversion of arginine to N-hydroxyarginine, the first oxygenation step in the enzymic synthesis of nitric oxide. · 1995 · https://pubmed.ncbi.nlm.nih.gov/7530247/ · DOI 10.1074/jbc.270.4.1721
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.