>sp|C6BZ96|RL21_MARSD Large ribosomal subunit protein bL21 OS=Maridesulfovibrio salexigens GN=rplU MYAIIETGGKQFRVEEGLELNVQKMDAEAGTKVDLDKILLIGQGEDVKIGAPYVEGAKVS CTVVEHGRDKKIVVFKKRRRKDSQTKQGHRQDYTRIKVEAIQA