As a rule, the orbital velocities of “hot Jupiters,” i.e., exoplanets with masses comparable to the mass of Jupiter and orbital semi-major axes less than 0.1 AU, are supersonic relative to the stellar ...

The cell envelope of archaea is fundamentally different from bacteria in that it does not contain peptidoglycan, and archaeal membranes are composed of ether lipids instead of ester lipids. Most ...

The cell envelope is composed of membranes and other outer structures, such as proteinaceous S-layers. The envelope is present in both gram-negative and positive bacteria but consists of different ...