The various passages and chambers of the site strongly
resembled the temples aboveground, with upright stone blocks spanned
by lintels, steps,
hinge holes for barriers and perhaps painted decorations.
The enzyme, Tang's team reports,
resembles the video - game character «Pac - Man,» with two bowl - shaped halves joined
by a
hinge at one end and held closed, most of the time,
by a latch of hydrogen bonds on the other end.