Fig. 4.

GAPDH tetramer drawn using the coordinates of the Protein Data Bank entry code 3GDP (Mercer et al. 1976). A ribbon representation has been used to draw one subunit. The balls represent the location of lysine residues in this subunit. The number of the reactive lysine residues (in black) refers to the human sequence. The number of reactive lysine residues along the rabbit sequence is given in parenthesis. The trace of the other subunits is also shown. The figure was drawn using MOLSCRIPT (Kraulis 1991).