Table 1. The number of processes, participants, roles, and relationships used in our model.

Entity                                                             #occurences



Process  (In Process diagram)                             53
    Nested                                                                   6
    Max degree nesting                                             4
    Routers                                                                18
    Low-level processes                                          29

Participants (In Participant-Role diagram)         29
    Complexes                                                            4
    Collections                                                            3
    Individual molecules                                         17
    Domains                                                                5
    Roles  (In Participant-Role diagram)              12
    Disease roles                                                       2
    Functional roles                                                 10

Relationships
    Process followed-by process*                        64
    Participant is-input-for process*                     56
    Participant is-output-of process*                    68
    Participant participates-in process*               14
    Participant inhibits process*                             3
    Participant is-a participant                              10
 

* only Low-level processes are considered for process-participant relationship types.