At the left of the bubble is the three-subunit (UL5, UL8 and UL52) helicase–primase complex, with the direction of helicase unwinding of double-stranded DNA indicated by a wavy arrow.

Background: Within axial spondyloarthritis (axSpA), the Bath Ankylosing Spondylitis Metrology Index (BASMI) is widely used to assess spinal mobility. However, this measure does not correlate well with ...