<prompt> Collagen 17 isHemi-desmosome BPAG1Hemi-desmosome BPAG2Anchoring filamentsAnchoring fibrils  <response>: INFERIOR POION OF BASAL KERATINOCYTE Hemidesmosome HD:- Appears as thickened area interspersed along plasma membrane of basal keratinocyte; provides attachment between basal keratinocyte and extracellular matrix. Composed of following macromolecules: BPAG1, BPAG2, integrin, and plectin . Tonofilaments or keratin filaments inse into hemidesmosomes . BPAG1 230 kDa :- Intracellular glycoprotein in plakin family which is associated with the cytoplasmic plaque domain of hemidesmosomes; promotes adhesion of intermediate filaments with plasma membrane likely binds or anchors filaments to HD. BPAG2 180kDa, Collagen XVII :- Transmembrane mainly extracellular protein belonging to collagen family; interacts with BPAG1, b4 integrin, and plectin. Ref:- Sima Jain; pg num:- 7 