Primers for fusion of protein A and ompA and alpha or omega part of beta-lactamase were designed:

alphaL+link14+homo (alphaL_link)
CAGTGGTGGAAGCGGTGGC GGAGGATCTGGAGGAGGTGGTTCTGGAGGTGGAGGT CACCCAGAAACGCTGGTGAAAG
alphaP+STOP+XbaI+BamHI (alphaP_XB)
GG GGATCC GG TCTAGA TTA TTCGCCAGTTAATAGTTTGCG
omegaL+link14+homo (omegaL_link)
CAGTGGTGGAAGCGGTGGC GGAGGATCTGGAGGAGGTGGTTCTGGAGGTGGAGGT CTACTTACTCTAGCTTCCCGG
omegaP+STOP+EcoRI+PstI+BamHI (omegaP_EPB)
AAGGATCCAACTGCAGAAGAATTC TTACCAATGCTTAATCAGTG
OmpAL+NdeI (ompaL_N)
CATATGAAAGCTACTAAACTGGTACTGGG
OmpAP+link8+SacI+NotI+homo (ompaP_link)
GCCACCGCTTCCACCACT GCGGCCGC CA GAGCTC CCTCCTCCAGAACCTCC GCCGTTGTCCGGACGAGTGCCGATG