ko_reference: KEGG Orthology (KO) Reference Dataset

In ggpicrust2: Make 'PICRUSt2' Output Analysis and Visualization Easier

KEGG Orthology (KO) Reference Dataset

Description

A comprehensive reference dataset mapping KEGG Orthology (KO) identifiers to their pathway classifications and descriptions. Each KO entry can appear in multiple rows if it belongs to multiple pathways.

Usage

data("ko_reference")

Format

A data frame with 58693 observations and the following columns:

id

Character. KO identifier (e.g., "K00001")

PathwayL1

Character. Top-level KEGG pathway category (e.g., "Metabolism")

PathwayL2

Character. Second-level pathway category (e.g., "Carbohydrate metabolism")

Pathway

Character. Specific pathway name with ID (e.g., "Glycolysis / Gluconeogenesis [PATH:ko00010]")

description

Character. KO entry description with gene name and EC number

Source

KEGG REST API (https://rest.kegg.jp)

Examples

data("ko_reference")
head(ko_reference)

# Check pathway hierarchy
table(ko_reference$PathwayL1)

ggpicrust2 documentation built on April 10, 2026, 5:06 p.m.