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CompoundsSubstances with curated findings
OutcomesMeasured endpoints
ProteinsTransporters and enzymes
InteractionsPairs that share biology
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ReactionsRhea and Human-GEM, by subsystem
ReachWhat a compound can become

Reference layer

PathwaysReactions grouped under one name
ProcessesWhat proteins are annotated as doing
AnatomyTissues, by what is expressed there
Cell typesCells, by what is expressed there
OrganismsSpecies a compound is prepared from
MaterialsSubstances that are not one molecule
AssessmentsRegulatory determinations, transcribed
DiseasesFeatures, genes, and where each sits

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Reference

Evidence

Compounds
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Proteins
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Reach

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Processes
Anatomy
Cell types
Organisms
Materials
Assessments
Diseases

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Catalyst

Computational infrastructure for human biology, built on a provenance-aware knowledge graph. Findings retain their sources; research and simulation are the next layers.

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A reference for what the literature reports. Not medical advice.

Reach

a ganglioside GM1b (d18:1(4E))

362,296 routes · scope human · up to 3 steps · built 5 October 2026 · Reactions · API

Inferred

Every route here is a hypothesis drawn from reference reactions (Rhea and Human-GEM), not a finding. Currency species such as water, ATP and NAD(H) never form a step. Evidence key

2 compounds within 3 steps: 2 in 1, 0 in 2, 0 in 3

Does it reach a compound?

One step

a ganglioside GD1alpha (d18:1(4E))Reach from here →
1. a ganglioside GM1b (d18:1(4E)) + CMP-N-acetyl-beta-neuraminate = a ganglioside GD1alpha (d18:1(4E)) + CMP + H(+)
Catalysed by ST6GALNAC3, ST6GALNAC6, ST6GALNAC5, ST6GALNAC4
a ganglioside GD1c (d18:1(4E))Reach from here →
1. a ganglioside GM1b (d18:1(4E)) + CMP-N-acetyl-beta-neuraminate = a ganglioside GD1c (d18:1(4E)) + CMP + H(+)
Catalysed by ST8SIA5, ST8SIA6, ST8SIA1