Fig. 3

Parameters for fragment termini search and pairing. a Definition of the terminus propagation direction: the direction (orange arrow) from the local center of mass (green dot) to the terminus (red dot). b Definition of the search sector (blue contour): area swept by the search angle around the propagation direction. c Similarity criterion defines the maximum angle difference between the propagation direction (orange arrow) of the based terminus (red dot) and the reverse direction (purple arrow) of the endpoint (green dot) under investigation. d Proximity criterion defines the maximum distance (blue two-head arrow) between every two endpoints (red and green dots). e Continuity criterion defines the maximum angle difference between the propagation direction (orange arrow) of the based terminus (red dot) and the vector (blue arrow) pointing from the red dot to the green dot. f Inner filament criterion for the case where multiple eligible fragments are found. The connection between the red and green termini is to be rejected in preference of the inner filament fragment