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Table 1 Samples groups from the Janus Serum Bank repository

From: Ultralow amounts of DNA from long-term archived serum samples produce high-quality methylomes

Group Sample collection period Sample source Serum processing Produced reads M range (mean) Analysed Cs (M) range (mean) Analysed for DNA yield (N)
1 1972–1978 HE Iodoacetate added 287–889 (602) 3642–12,188 (8102) 10
2 1979–1986 HE No additives 450–892 (707) 6200–11,843 (9586) 13
3 1987–2004 HE Separating gel tubes 202–898 (644) 2573–12,184 (8650) 39
4 1973–1979 RCBD Lyophilisation 376–889 (666) 5005–12,270 (8983) 14
5 1980–1990 RCBD No additives 356–854 (626) 4611–11,850 (8341) 13
6 1997–2004 RCBD No additives 327–685 (602) 4881–9480 (8059) 5
Total     94 out of 96   94 out of 96
  1. The samples are collected as part of national health examinations (HE), or from red cross donors (RCBD). Pre-analytical handling differs between groups. The last columns show the number of reads produced (millions, range and mean indicated), number of C analysed (millions, range and mean indicated) and number of samples used for calculating DNA yield, respectively. Further description of the groups can be found somewhere else [2, 4, 6]