Defined in file cn3d.asn C++ class: CCn3d_backbone_label_style Cn3d-backbone-label-style ::= SEQUENCE { -- style blob for backbone labels spacing INTEGER, -- zero means none type ENUMERATED { one-letter (1), three-letter (2) }, number ENUMERATED { none (0), sequential (1), -- from 1, by residues present, to match sequence pdb (2) -- use number assigned by PDB }, termini BOOLEAN, white BOOLEAN -- all white, or (if false) color of alpha carbon }