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Table 1 Relative cloning frequencies of HERV-K(HML-2) loci transcribed in ESC, iPSC and ECC lines

From: Human endogenous retrovirus K (HML-2) RNA and protein expression is a marker for human embryonic and induced pluripotent stem cells

    ESC ESC ESC iPSC iPSC iPSC iPSC iPSC iPSC ECC ECC ECC
Alias Type ORF BG01 H1 H9 MRC MRC MSC MSC hFib2 hFib2 GH NCCIT 2102
       iPS7 iPS20 iPS1 iPS3 iPS4 iPS5    Ep
K101(22q11.21) 1 g/n 64 60 57 69 61 56 88 62 39 75 16 29
ERVK-24               
K10(5q33.3) 1 g/prt/n - 26 7,3 8 23 5,5 6 - 22 8,5 21 -
ERVK-10               
K109(6q14.1) 2 g/prt/e/r - 7 7,3 - 8 - - - - - - 42
ERVK-9               
K106(3q13.2) 1 g/n - - - - - 5,5 - 8 11 - 5 -
ERVK-3               
K37(11q23.3) 1 g/prt/n 36 - 14 15 8 22 - 15 16 - - -
ERVK-20               
HKc10-B(10q24.2) 2 g/r - 7 7 - - 11 - - 6 - - -
ERVK-17               
KI(3q21.2) 2 r - - - 8 - - 6 - 6 - - -
ERVK-4               
K115(8p23.1) 2 pol/e/r - - - - - - - 15 - - - -
ERVK-8               
K41(12q14.1) 2 g/prt/e/r - - 7,3 - - - - - - - - -
ERVK-21               
K108(7p22.1) 2 g/prt/e/r - - - - - - - - - 16,5 11 29
ERVK-6               
K102(1q22) 1 n - - - - - - - - - - 47 -
ERVK-7               
  1. Proviruses are designated by name and chromosomal locus, by type and putative open reading frames (ORF). For each cell line the relative cloning frequencies of the respective HERV-K(HML-2) loci are given as % (number of sequences assigned to the locus divided by the total number of sequences generated from the cDNA sample). 14 clones were generated and analyzed for BG01, 2102Ep, H9; 15 for H1; 13 for MRCiPS7, MRCiPS20, hFib2iPS4; 17 for MSCiPS3; 18 for hFib2iPS5; 19 for MSCiPS1 and NCCIT, 24 for GH. Open reading frames for Gag (g), Protease (prt) Envelope (e), Rec (r) NP9 (n).