Functional categories of transcripts with differential expression in left atrial tissue of old versus young swine.

Number of transcripts exhibiting expression changes with age, placed into functional categories. All transcripts with mean expression change ≥2-fold, P<0.05 between groups are included, after being filtered to remove transcripts with mean log 2 intensity <5 in both groups. Functional categorization based on literature search and/or or sequence homology. Functional categories with <3 total altered genes are grouped together in “Other known functions”.