Cloning and characterisation of a delta virus cDNA Sequence derived from a human source

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Abstract
We report the extraction of delta virus RNA from the serum of a delta‐virus‐infected patient and the subsequent cloning and analysis of a 380‐nucleotide‐long cDNA (D380). The nucleotide sequence of D380 shows overall differences of approximately 20% when compared with previously published sequences and docs not include the viroid consensus sequence previously reported (Wang et al: Nature 323:508‐514, 1986). A potentially coding open reading frame extending over the whole length of the D.380 has been identified. Our results demonstrate the existence of genetic heterogeneity amongst different delta virus isolates.