TY - RPRT TI - Positional requirements for the function of nif-specific upstream activator sequences. AU - M Buck AU - J Woodcock AU - W Cannon AU - L Mitchenall AU - M Drummond PY - 1987 DO - 10.1007/bf00337770 UR - https://pubmed.ncbi.nlm.nih.gov/3323835/ ID - 3323835 ER -