CD166 is a member of the Ig superfamily and is expressed on activated T-cells, B cells and other cells including thymic epithelial cells, fibroblasts, keratinocytes and neurons. CD6 has been identified as a receptor for CD166. $n The expression of CD166 is up-regulated in low-grade prostate tumors and down-regulated in high-grade tumors; may play role in progression of prostate cancer.

ADAM28 was first described in lymphocytes, also in Thymic Endothelial Cells (TECADAM), as well as in the epididymus. Later works describe two forms of ADAM28: ADAM28-S and ADAM28-L (short and long forms). The short form is a soluble, alternatively spliced form lacking the transmembrane and cytoplasmic domains. Message levels of the short form were found to be much lower than the long form in the tissues studied, but these may be tissue-specific differences. In humans, ADAM28 is reported in l

ADAM23 is a non-catalytic metalloprotease-like protein. It is highly expressed in the brain, primarily in the amygdala, caudate nucleus, hypothalamus, thalamus, cerebral cortex and occipital pole, and weakly expressed in the heart. 3 isoforms are produced by alternative splicing, alpha, beta and gamma. ADAM23 may play a role in cell-cell and cell-matrix interactions.

ADAM23 is a non-catalytic metalloprotease-like protein. It is highly expressed in the brain, primarily in the amygdala, caudate nucleus, hypothalamus, thalamus, cerebral cortex and occipital pole, and weakly expressed in the heart. 3 isoforms are produced by alternative splicing, alpha, beta and gamma. ADAM23 may play a role in cell-cell and cell-matrix interactions.

NARG2 is expressed at relatively high levels in dividing and immature cells, and is down-regulated upon terminal differentiation. NARG2 is a novel (S/T)PXX motif-containing nuclear protein; this motif is present in many transcription factors as well as other regulatory proteins that bind to DNA such as histones and RNA polymerase II. Three different isoforms exist.

Hepatitis B Virus Core Antigen (HBcAg) is part of the infectious virion containing an inner “core particle“ enclosing the viral genome. The icosahedral core particle contains 180 or 240 copies of the core protein. HBcAg is one of the three major clinical antigens of hepatitis B virus but disappears early in the course of infection.$nThe hepatitis B virus core antigen (HBcAg) is a highly immunogenic subviral particle and functions as both a T-cell-dependent and a T-cell-independent antigen.