The pattern of transcripts with variable day-to-day expression seems to be in majority individuum-specific.

Distribution of transcripts with high day to day variability in expression among healthy individuals for A) CD4+ T, and B) NK cells is shown. Transcripts identified as highly variable (CV>0.5) in at least one individual are ordered in rows of the heat map (1952 transcripts for CD4+ T and 2635 transcripts for NK cells). Individuals included in our study are listed in columns. Grey colour – the transcript was not identified as highly variable in the particular volunteer. Black colour – the transcript was identified as highly variable in particular volunteer.