- Phosphatidylserine Synthase 2 (PTDSS2)
- Phosphatidylserine Synthase 1 (PTDSS1)
- Proline Serine Threonine Phosphatase Interacting Protein 1 (PSTPIP1)
- Protein Serine Kinase H1 (PSKH1)
- Phosphoribosyl Pyrophosphate Synthetase 2 (PRPS2)
- Phosphoribosyl Pyrophosphate Synthetase 1 (PRPS1)
- Protein Kinase, Y-Linked (PRKY)
- Protein Kinase, X-Linked (PRKX)
- Protein Kinase, cGMP Dependent Type II (PRKG2)
- Protein Kinase, cGMP Dependent Type I (PRKG1)
- Primase, DNA Polypeptide 2 (PRIM2)
- Primase, DNA Polypeptide 1 (PRIM1)
- Prolyl Endopeptidase (PREP)
- Prolyl Endopeptidase Like Protein (PREPL)
- Protein Phosphatase Methylesterase 1 (PPME1)
