FIG. 4.

Map of restriction sites for the enzymes HaeIII and RsaI for the RFLP patterns detected in clones from our libraries and retrieved from the GenBank database (patterns exclusive of GenBank clones are shaded). For convenience, the positions of restriction sites are referred to the sequence of clone SB95-57. The DNA fragments that formed each RFLP pattern can be determined by subtracting two consecutive restriction sites (for example, pattern H-I-A was formed by the 215-, 28-, 72-, 187-, 280-, and 132-bp fragments).