Table 1. List of peptides used in study.

Peptide name	Peptide sequence	AA residues: arginine residues	Net peptide charge at pH 7
R1	H-R-OH	1: 1	1
R3	H-RRR-OH	3: 3	3
R6	H-RRRRRR-OH	6: 6	6
R7	H-RRRRRRR-OH	7: 7	7
R8	H-RRRRRRRR-OH	8: 8	8
R9	H-RRRRRRRRR-OH	9: 9	9
R9D	H-rrrrrrrrr-NH2	9: 9	10
R10	H-RRRRRRRRRR-OH	10: 10	10
R11	H-RRRRRRRRRRR-OH	11: 11	11
R12	H-RRRRRRRRRRRR-OH	12: 12	12
R13	H-RRRRRRRRRRRRR-OH	13: 13	13
R14	H-RRRRRRRRRRRRRR-OH	14: 14	14
R15	H-RRRRRRRRRRRRRRR-OH	15: 15	15
R18	H-RRRRRRRRRRRRRRRRRR-OH	18: 18	18
R9/X7/R9	H-RRRRRRRRRPGRVVGGRRRRRRRRR-OH	25: 19	19
E9/R9	H-EEEEEEEEE-RRRRRRRRR-OH	18: 9	0
K10	H-KKKKKKKKKK-OH	10: 0	10
PTD-4a	H-YARAAARQARA-OH	11: 3	3
TAT	Ac-GRKKRRQRRRG-NH2	11: 6	8
TAT-NR2B9cb	H-GRKKRRQRRR-KLSSIESDV-OH	19: 6	7
JNKI-1-TATDc	H-tdqsrpvqpflnlttprkprpp-rrrqrrkkrG-NH2	32: 9	12
TAT-JNKI-1c	H- GRKKRRQRRR-PPRPKRPTTLNLFPQVPRSQDT-OH	32: 9	11
kFGF-JNKI-1	H-AAVALLPAVLLALLAP-PPRPKRPTTLNLFPQVPRSQDT-OH	38: 3	3
kFGFd	H-AAVALLPAVLLALLAP-OH	16: 0	0
PYC36-TATe	H-GRKKRRQRRR-GGLQGRRRQGYQSIKP-NH2	26: 9	13
NCXBP3f	H-RRERRRRSCAGCSRARGSCRSCRR-NH2	24: 11	10.8
XIPg	H-RRLLFYKYVYKRYRAGKQRG-OH	20: 5	8
BEN0254h	Ac-WGCCGRSSRRRRTR-NH2	14: 6	5.9
BEN0540h	Ac-PFLKRVPACLRLRR-NH2	14: 4	5
BEN1079h	Ac-RCGRASRCRVRWMRRRRI-NH2	18: 8	8.9

At the N terminus, H indicates free amine, and Ac indicates acetyl. At the C terminus, OH indicates free acid and NH₂ indicates amide. Lower case single-letter code indicates D-isoform of the amino acid (AA).

^aPeptide described in Ho et al.¹²

^bNR2B9c-TAT peptide described by Aarts et al.⁶

^cPeptide described in Borsello et al.³⁷

^dPeptide described in Lin et al.¹⁴

^ePeptide described in Meade et al.^{2, 3}

^fPeptide isolated by JLC from phylomer library (Phylogica Pty Ltd).

^gXIP described by He et al.³⁸

^hPeptides isolated by Phylogica Pty Ltd.