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Table 1 Properties of recombinant NDV strains: F protein cleavage site and virulence.

From: Virulence of newcastle disease virus: what is known so far?

Virus Parent Cleavage site ICPI IVPI Reference
NDFL LaSota GRQGRL 0.00 0.00 [43]
NDFLtag* LaSota RRQRRF 1.28 0.76 [43, 67]
NDFL(F) H LaSota RRQRRF 1.31 0.41 [49]
rLaSota LaSota GRQGRL 0.00 0.00 [42]
rLaSota V.F.* LaSota RRQKRF 1.12 0.00 [62]
rNDV Clone 30 GRQGRL 0.01   [63]
rNDVF1* Clone 30 RRQKRF 1.28   [63]
NDV/ZJ1 ZJ1 RRQKRF 1.88 2.80 [50]
NDV/ZJ1FM ZJ1 GRQERL 0.13 0.00 [64]
FL-Herts Herts/33 RRQRRF 1.63 2.29 [49]
rgAV324 AV324/96 RRKKRF 0.10 0.00 [46]
FL-Herts(F) AV Herts/33 RRKKRF 1.56   [46]
rgAV324(F) H AV324/96 RRQRRF 0.00   [46]
  1. * lentogenic cleavage site motif modified into velogenic cleavage site motif.
  2. † velogenic cleavage site motif modified into lentogenic cleavage site motif.
  3. Superscript H: F gene originating from strain Herts/33.
  4. Superscript AV: F gene originating from strain AV324/96.