6981045 Sputw3181_3091 omp_nag 6981044 Sputw3181_3090 hex 6981039 Sputw3181_3084 nagP 6981043 Sputw3181_3089 nagK 6981042 Sputw3181_3088 nagB2 6981041 Sputw3181_3087 nagA