This family consists of several formyl peptide receptor-like 1 inhibitory proteins from Staphylococcus aureus. These are secreted proteins that block the formyl peptide receptor-like 1 found in neutrophils, monocytes, B cells, and NK cells; and inhibit the binding of chemoattractants (such as formylated peptides) to FPRL1, which initiate phagocyte mobilization towards the infection site [1].

1: A new staphylococcal anti-inflammatory protein that antagonizes the formyl peptide receptor-like 1. Prat C, Bestebroer J, de Haas CJ, van Strijp JA, van Kessel KP; J Immunol. 2006 Dec 1;177(11):8017-26. PMID:17114475