Toll-like receptor 9 (TLR9) often known as CD289 (cluster of differentiation 289), is a member of the Toll-like receptor family that recognizes pathogen-associated molecular pattern.

Toll-like receptor 8 (TLR8) often designated as CD288 (cluster of differentiation 288) is a member of evolutionarily conserved Toll-like receptor family which are critical parts of the evolutionarily conserved innate immune system.

Toll-like receptor 7 (TLR7), is an immune gene possessed by humans, other mammals and additionally in avian species playing a significant role in initiating antiviral immune responses.

Toll-like receptor 6 (TLR6) often designated as CD286 (cluster of differentiation 286), is a member of the Toll-like receptor family, a highly conserved series of ancient innate immune pattern recognition receptors.

Toll-like receptor 5 (TLR5), a member of the evolutionarily conserved Toll-like receptor family, has evolved to permit mammals specifically to detect flagellated bacterial pathogens.

Toll-like receptor 4 (TLR4) often designated as CD284 (cluster of differentiation 284) is a class I transmembrane receptor belonging to the large homologous family of Toll like receptors.

Toll-like receptor 3 (TLR3) often designated as CD283 (cluster of differentiation 283) is a type I transmembrane receptor protein.

Toll-like receptor 2 (TLR2), often designated as CD282 (cluster of differentiation 282) is a type I transmembrane protein belonging to the large homologous family of Toll like receptors.

Folates play an important role in protein and nucleic acid biosynthesis and are particularly recognized for their roles in spinal canal and brain development during early pregnancy.

Neuropilin-1 (Nrp-1) was recently identified as a possible surface marker for naturally occurring CD4+CD25+ regulatory T cells and is constitutively expressed on the cell irrespective of its activation status.