sp|A4FQ15|MURB_SACEN UDP-N-acetylenolpyruvoylglucosamine reductase OS=Saccharopolyspora erythraea (strain ATCC 11635 / DSM 40517 / JCM 4748 / NBRC 13426 / NCIMB 8594 / NRRL 2338) OX=405948 GN=murB PE=3 SV=1