CLUSTERID Symbol ID_IPI Protein Name Tissue Annotation
CLUSTER1_Down IVL IPI00011692 Involucrin Keratinocyte,Skin,
  S100A2 IPI00019869 Protein S100-A2 Keratinocyte,Mammary epithelium,Ovary,
  S100A8 IPI00007047 Protein S100-A8 Ascites,Keratinocyte,Neutrophil,Skeletal muscle, Tongue,
  S100A9 IPI00027462 Protein S100-A9 Keratinocyte,Liver,Lung,
  YWHAB IPI00216318 Isoform Long of 14-3-3 protein beta/alpha Brain, Colon carcinoma,Keratinocyte,Platelet,Skin,
CLUSTER2_Up CANX IPI00020984 Calnexin precursor B-cell lymphoma,Epithelium,Fibroblast,Keratinocyte,Kidney,Liver,Lymph,Placenta,Platelet,
  FLNB IPI00477536 Isoform 7 of Filamin-B Aortic endothelium, Endometrial tumor, Endometrium carcinoma cell line, Endothelial cell,Epithelium,Fetal brain,Keratinocyte,Placenta,Skeletal muscle, Thyroid,
  HNRNPL IPI00027834 heterogeneous nuclear ribonucleoprotein L isoform a Brain,Cajal-Retzius cell, Fetal brain cortex,Keratinocyte,Pancreatic cancer, Synovial membrane tissue, Uterus,
  KRT7 IPI00306959 Keratin, type II cytoskeletal 7 Colon carcinoma,Epithelium,Keratinocyte,Mammary cancer,Mesothelium,Ovarian carcinoma,Pancreas,PCR rescued clones, Placenta,
  KRT19 IPI00479145 Keratin, type I cytoskeletal 19 Keratinocyte, Lymph node, Mammary gland,Pancreas,Peripheral blood leukocyte, Placenta,
Using DAVID, categorization for annotation with keratinocytes yielded two clusters of 5 up-regulated and 5 down-regulated proteins
Table 3: Arsenic regulated proteins annotated with keratinocyte term.