Forms part of the ribosomal stalk which helps the ribosome interact with GTP-bound translation factors. Is thus essential for accurate translation (Probable). Homodimer. Part of the 50S ribosomal subunit; present in 4 copies per ribosome. Forms part of the ribosomal stalk which helps the ribosome interact with GTP-bound translation factors. Forms a pentameric L10(L12)2(L12)2 complex, where L10 forms an elongated spine to which 2 L12 dimers bind in a sequential fashion. Isolated L10(L12)4, grown at 55 degrees Celsius. Grown at 55 degrees Celsius. Belongs to the bacterial ribosomal protein bL12 family.