RANKL, or Receptor Activator of Nuclear Factor Kappa-B Ligand, is a crucial protein involved in the regulation of bone metabolism in the human body.

Proteasomes are a key component of the ubiquitin-proteasome pathway, a central platform for recycling proteins involved in crucial cellular processes, including cell cycle progression, DNA repair, and transcription.

Programmed cell death protein-1 (PD-1) is an important immune inhibitory molecule, belonging to the immunoglobulin superfamily.

Phosphodiesterase 4 (PDE4) is an enzyme found in various tissues of the human body, including the immune cells, brain, and lungs.

Prostaglandin synthases are enzymes that play a crucial role in the human body by catalyzing the synthesis of prostaglandins.

PPAR, or peroxisome proliferator-activated receptor, is a group of nuclear receptor proteins found in the human body.

Proteases are enzymes that play a crucial role in the human body by breaking down proteins into smaller peptides or amino acids.

PRMT5 expression is associated with a poor prognosis in tumor progression and metastasis.

PARP1 is the most prominent member of the PARP family, accounting for 80%-90% of the enzyme activity, and is a key player in DNA damage repair.

Programmed death-ligand 1 (PD-L1) is a protein found on the surface of certain cells in the human body, including immune cells and some cancer cells.

PDE3 has the ability to hydrolyze both cAMP and cGMP, but its ability to hydrolyze cAMP is about ten times that of cGMP.

CYP2C9 is a member of the Cytochrome P450 superfamily of enzymes that primarily metabolize drugs in the human body.