The genesis of the collagen structure proposed by the Madras Group is brief
ly outlined. Recent crystal structure data on collagen-like peptides vindic
ate (i) the original proposal of Ramachandran and Kartha, namely, that the
structure of collagen is a triple helical coiled-coil one, and (ii) the vis
ualisation of the maximisation of hydrogen bonds directly or indirectly wit
h water molecules, including C-12-H...O hydrogen bonds.