Figure 1

Diagram and ontology placement of 'nuclear inner membrane'. (A) Diagram of human cell nucleus, including the nuclear inner membrane. (Taken from Wikimedia commons, http://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Diagram_human_cell_nucleus.svg/2000px-Diagram_human_cell_nucleus.svg.png). (B) Placement of the Gene Ontology term GO:0005637 'nuclear inner membrane', drawn using the ontology editing tool OBO-Edit (see ‘Methods’). Due to space limitations, not all ancestor and descendant terms are shown. Is_a links are indicated by "I"; part_of links are indicated by "P" (see main text for explanation).