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Analysis of Translation Initiation Sites in the Complete Genome of Mycoplasma genitalium Suggests That This Bacterium Uses Alternative Signal for Translation Initiation

Although the Shine-Dalgarno (SD) sequence [5] is widely accepted as the signal sequence for ribosomemRNA binding in procaryotic translation initiation, this sequence is not well conserved among genes within or among species. This is especially striking in Mycoplasma genitalium [2], where no obvious conserved sequence can be observed upstream of start codons[1]. To investigate the possibility of an alternative sequence pattern to account for the lack of SD sequences, we have conducted computer analyses of translation initiation sites (ORF start sites) in the complete genome sequence of M. genitalium [3].