Table 3 Sequences of random linking peptides in PA(A)-PL structure and their distribution in hIgM and hIgA selected libraries

Nucleotide sequence of random linking peptide

TAC TGG TTG

AAA CTA GCT AAC AAC

TTG

GGT GAG ATG CAC

GAC TTT ATT

Amino acid sequence of random linking peptide

Y W L

K L A N N

L

G E M H

D F I

Number of clones selected with hIgM (11*)

4

2

3

1

1

Number of clones selected with hIgA (10)

5

2

2

1

0