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. 2012 Nov 23;41(Database issue):D456–D463. doi: 10.1093/nar/gks1146

Table 1.

ChEBI data content

Curation level Chemical classes Compounds Roles Subatomic particles All ChEBI
Number of entries 1 2352 1201 113 1 3667
2 40 4321 0 0 4361
3 8128 20 961 652 41 29 782
ALL 10 520 26 483 765 42 37 810
Number with definitions 1 116 262 40 1 419
2 14 4316 0 0 4330
3 4215 11 763 601 38 16 617
ALL 4345 16 341 641 39 21 366
Number of relationships 1 2352 1201 113 1 11 185
2 40 4321 0 0 8936
3 8128 20 961 652 41 149 680
ALL 10 520 26 483 765 42 169 801
Number of ‘is_a’ relationships 1 6802 2749 202 1 9754
2 59 4462 0 0 4521
3 55 739 33 645 1496 98 90 978
ALL 62 600 40 856 1698 99 105 253
Number of ‘has_role’ relationships 1 80 257 292 0 629
2 2 4377 0 0 4379
3 486 7690 12 596 0 20 772
ALL 568 12 324 12 888 0 25 780
Number of ‘has_part’ relationships 1 59 11 0 0 70
2 4 0 0 0 4
3 1044 2269 8 15 3336
ALL 1107 2280 8 15 3410
Number of structural relationships 1 412 320 0 0 732
2 26 6 0 0 32
3 4064 30 530 0 0 34 594
ALL 4502 30 856 0 0 35 358
Number of citations 1 32 387 0 0 419
2 11 4510 0 0 4521
3 1734 17 604 38 1 19 377
ALL 1777 22 501 38 1 24 317
Number of cross-references 1 1672 1440 6 0 3118
2 3 3151 0 0 3154
3 2458 52 978 104 11 55 551
ALL 4133 57 569 110 11 61 823

This table shows a breakdown of the ChEBI data content in November 2012, by type of entity and by level of curation. The types of entity are chemical classes (grouping classes in the structure-based classification), compounds (fully specified with chemical structure) and roles. The levels of curation are as follows: 1–barely curated; 2–lightly curated; and 3–fully curated.