si_0717 Ubiquitin-like_archaeal_modifier_proteins_(SAMPs) Ubiquitin-like small archaeal modifier protein SAMP1 si_0717 Ubiquitin-like_archaeal_modifier_proteins_(SAMPs) Ubiquitin-like small archaeal modifier protein SAMP2 si_0717 Ubiquitin-like_archaeal_modifier_proteins_(SAMPs) HesA/MoeB/ThiF family protein, possibly E1-enzyme activating SAMPs for protein conjugation