This is very odd, and will require a rigorous investigation, but my initial reaction is one of scepticism. Considering just the 1st insert, the insert sequence is `GTNGTKR`, short at just 7 amino acids. A simple BLASTP vs NR did not reveal similarly to HIV sequences, but did reveal 100% identity across the full sequence length to >50 other short protein sequences, which could be spurious 'chance' hits of course. Many of the top 100 hits are against eukaryotic sequences, for example one is against *Pristionchus pacificus*, a type of nematode worm (see alignment below). Someone needs to do a proper peer review of this preprint before any conclusions are drawn.

```
>tank-1 [Pristionchus pacificus]
Sequence ID: PDM74036.1 Length: 2481 
Range 1: 1474 to 1480

Score:24.0 bits(49), Expect:2477, 
Method:, 
Identities:7/7(100%), Positives:7/7(100%), Gaps:0/7(0%)

Query  1     GTNGTKR  7
             GTNGTKR
Sbjct  1474  GTNGTKR  1480
```