Fibronectin attachment proteins (FAPs) comprise a family of fibronectin-binding glycoproteins that are expressed by several species of mycobacteria. FAPs are critical for attachment and internalization of Mycobacterium bovis BCG and M. avium subsp. avium to tissue of host. FAP-P Peptide corresponds to the FAP sequence (aa265-288) found in M. avium subsp. paratuberculosis., which mediates soluble fibronectin binding. However, unlike the FAPs of other mycobacteria, FAP-P is not present on the surface of the organism.