“…While some authors reported that RAbs showed lower 530 affinity than its parental MAb (Kramer & Hock, 1996;Graham, Porter, & Harris, 1995;Choi et al, 2004), i.e. the same behaviour as we found, others reported a comparable (Tout, Yau, Trevors, Lee, & Hall, 2001;Alcocer, Doyen, Lee, & Morgan, 2000;Nishi, Ishiuchi, Morimune, & Ohkawa, 2005) or even higher (Alcocer, Doyen, Lee, & Morgan, 2000;Strachan, Grant, Learmonth, Longstaff, Porter, & Harris, 1998;Pan et 535 al., 2006) affinity of RAbs over their counterpart MAbs. Results obtained in this study and those reported in the literature suggest that the folding of each scFv and, therefore, their analyte interaction properties depend on its particular amino acid sequence.…”