Table 2.

Library recovery levels on phosphotyrosyl peptide coated beads

	Precent of phage recovered on phosphotyrosyl peptide-coated beads
	Round 1	Round 2	Round 3
2-h incubation
Library	3.5 × 10−5	8.0 × 10−4	2.0 × 10−5
Backgrounda	3.6 × 10−6	5.8 × 10−5	2.0 × 10−6
ON incubation
Library	1.0 × 10−4	2.0 × 10−3	2.0 × 10−4
Background	3.2 × 10−6	1.2 × 10−6	1.4 × 10−6

^a Background recovery was taken to be recovery levels of phage displaying the protein L domain.