PHOTOSYNTHESIS, STRUCTURAL GENOMICS, NORTHEAST STRUCTURAL GENOMICS CONSORTIUM (NESG), PSI-2, PROTEIN STRUCTURE INITIATIVE SOLUTION NMR STRUCTURE OF THE PBS LINKER DOMAIN OF PHYCOBILISOME ROD LINKER POLYPEPTIDE FROM SYNECHOCOCCUS ELONGATUS, NORTHEAST STRUCTURAL GENOMICS CONSORTIUM TARGET SNR168A 2L3W