| breakpoint | <epidemiology> See transmission breakpoint. (05 Dec 1998) |
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| breakpoint cluster region | A region on chromosome 22 that is involved in the Philadelphia translocation. Acronym: BCR (15 Nov 1997) |
| transmission breakpoint | <epidemiology> A critical average worm burden below which the mating frequency is too low to maintain a dioecious parasite species. (05 Dec 1998) |
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