              Data items in the EXPTL_CRYSTAL_GROW_COMP category record\
               details about the components of the solutions that were 'mixed'\
               (by whatever means) to produce the crystal.\
\
               In general, solution 1 is the solution that contains the\
               molecule to be crystallized and solution 2 is the solution\
               that contains the precipitant. However, the number of solutions\
               required to describe the crystallization protocol is not limited\
               to 2.\
\
               Details of the crystallization protocol should be described in\
               EXPTL_CRYSTAL_GROW_DETAILS, using the solutions described in\
               EXPTL_CRYSTAL_GROW_COMP.