UBP551 is a potent and selective NMDA receptors modulator.

CP55,244 is a CB(1) receptor and CB(2) receptor agonist.

P552-02, also known as KM-003, PS 552-02, or 552-02, is a sodium channel blocker potentially for the treatment of cystic fibrosis.

NGP555 is a modulator of γ-secretase.

Orphan GPCR SP9155 agonist P550 (mouse, rat) (26RFa (mouse, rat)) is an orphan GPCR with an orexigenic effect belonging to the RFamide peptide family. It acts as the cognate ligand for the mouse orphan receptor GPR103, which is also known as SP9155 or AQ27.

Vopikitug, a human IgG1-kappa monoclonal antibody targeting the IL2RA (interleukin 2 receptor alpha subunit, IL-2RA, TAC, p55, CD25), exhibits antineoplastic activity [1].

Onercept, a recombinant soluble form of the human tumor necrosis factor-alpha (TNF-α) p55 receptor, is utilized in the study of Crohn's disease [1].

Semzuvolimab, a murine IgG1κ antibody, targets the p55 T-cell surface antigen T4/Leu-3 (CD4). It has demonstrated capabilities to neutralize HIV infection and may inhibit HIV in patients on stable highly active antiretroviral therapy (HAART) [1] [2].

Lenercept (Ro 45-2081) is a recombinant fusion protein combining the soluble TNF-receptor (p55) with the Fc portion of human IgG1 [1].

26RFa acetate is a hypothalamic neuropeptide with orexigenic activity in mammals[1].

Hypothalamic RFamide-related neuropeptide. Acts as a natural ligand of the orphan receptor GPR103. Exhibits orexigenic acitivity in mice upon central administration.

Orphan GPCR SP9155 agonist P550 (mouse, rat) acetate (Orphan GPCR SP9155 agonist P550 ) is a member of the RFamide peptide family with orexigenic effects.