Table 1.

Selected variants from the GaLV-X3 libraries^a

Clone	Selected sequenceb	Libraryc	Frequency
	↓
WT	RISAV K I LVL R QKYQALENEGNL	control	control
#1	RISAGC STGPCAEIQALENEGNL-	n	17/34
#7	RISAV R K LVL D QKYQALENEGNL-	n	1/34
#48	RISAV P G LGPSPEISGSRERR-	m and n	1/9 and 2/34
#12	RISAV R R LVL P QKYQALENEGNL-	m	1/9
#27	RISAV R L LGP-	m	1/9

^aOnly those variants that were used for further analysis are listed.

^bDiversified positions are depicted in bold, additional mutations are underlined, the R peptide cleavage site is indicated by an arrow.

^cClones obtained from selection of the pMSCV-GaLV-X3-NEO library (n) or pMSCV-GaLV-X3 library (m).