Sequences of rearranged Ig heavy chain variable region genes of human anti-alpha3(IV)NC1 collagen monoclonal antibody 2D6. Sequence of mAb 2D6 heavy chain V-D-J region and sequences of the closest corresponding germline variable region gene segments identified in the IMGT/V-QUEST reference databases, with CDR-IMGT delineated according to the IMGT unique numbering for V-DOMAIN