The relation of spanion cluster concentration and GO terms. The protein coding Human genes were ranked according to the spaninoncluster content of the 6 kb transcript proximal region. The frequency of the GO terms associated with the 500 top scoring genes was obtained and compared with the GO term frequencies of the full set. In random case one would expect values proportional with the ratio of the sizes of the two sets. This ratio is indicated by dashed line on the plot. Points above the line correspond to GO terms overrepresented in the short listed set of high spanioncluster content genes. The 25 most frequent GO terms are listed in Table 2.