Essential translation initiation factors of H. volcanii and the phenotypes of conditional depletion mutants with (d) or without (nd) depletion.

d = depleted; nd = non-depleted; td = doubling time; g.y. = growth yield; s.d. = standard deviation, bold print = phenotypes; equal = equal to the wild-type;* = these values are not related to the wild-type shown in this table but to a separate experiment.