Indicate whether each of the following descriptions better applies to glycosaminoglycans (G), fibrous proteins (F), or glycoproteins (P) of the extracellular matrix in animal cells. Your answer would be a six-letter string composed of letters G, F, and P only, e.g. GFPGFP.
( ) They include laminin and fibronectin.
( ) They primarily include collagens.
( ) They include hyaluronan.
( ) They are found in proteoglycans.
( ) They occupy large volumes and form hydrated gels.
( ) They constitute the major proteins of the matrix.