Protein synthesis is a complex, multistep process that requires, in addition to the ribosome, several extrinsic GTP-hydrolysing protein factors during each of the main stages of initiation ...

Ammonium transporters of the Mep/Amt family are polytopic membrane proteins highly conserved in eubacteria, archaebacteria, fungi, plants and invertebrates 6, 7, 8. Although no Mep/Amt protein has ...

Acidianus infernus gen. nov., sp. nov., and Acidianus brierleyi comb. nov.: facultatively aerobic, extremely acidophilic thermophilic sulfur-metabolizing archaebacteria.