Table 7. Polymorphic Mspl and Ddel restriction sites which could be used to distinguish Mspl M300 variants. M300 variant/ Restriction site" Ddel variant group Ddel-1450 Mspl-5420 Ddel-4530/5280 M301/D200 + M301/D300 + + M302/D 100 + M303/D400 + + + M304/D500 + + + a (+), Site present; (-), site absent