preferred_name: Transfer of Ub from E2 to substrate and release of E2 (Gallus gallus)
preferred_name_lc: transfer of ub from e2 to substrate and release of e2 (gallus gallus)
label: Transfer of Ub from E2 to substrate and release of E2 (Gallus gallus)
label_lc: transfer of ub from e2 to substrate and release of e2 (gallus gallus)