TY - GEN AU - Price,Morgan N AU - Alm,Eric J AU - Arkin,Adam P TI - The histidine operon is ancient SN - 0022-2844 PY - 2006///0912 KW - Histidine KW - genetics KW - Operon KW - Phylogeny KW - Proteobacteria KW - Time N1 - Publication Type: Comment; Letter UR - https://doi.org/10.1007/s00239-005-0191-3 ER -