Assertion: lipid's number | /r/HasProperty | conserved characteristic
Facets:
value: extremely
type: DEGREE
Source sentences:
text: However, in addition to the problem of a bacterial-to-archaeal membrane transition, the recent discovery of an archaeon with a double membrane, Ignicoccus hospitalis54, invalidates the idea that the number of cell membranes is an extremely conserved characteristic that was altered only once during the history of the three domains.