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I'm wondering about the carrying capacity also referred to packaging capacity or loading capacity (how many base pairs can be packed efficiently into virions) of the pseudotyped rabies virus SAD-dG as described in the Wickersham, Callaway publications.

Wickersham, I. R., Finke, S., Conzelmann, K.-K., & Callaway, E. M. (2006). Retrograde neuronal tracing with a deletion-mutant rabies virus. Nature methods, 4(1), 47–49. doi:10.1038/nmeth999

Wickersham, I. R., Lyon, D. C., Barnard, R. J. O., Mori, T., Finke, S., Conzelmann, K.-K., et al. (2007). Monosynaptic Restriction of Transsynaptic Tracing from Single, Genetically Targeted Neurons. Neuron, 53(5), 639–647. doi:10.1016/j.neuron.2007.01.033

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