Table 2.

Amount of protein (%) retained in the supernatant after thermal stress.

Variants	60 °C				75 °C
	Na-Acetate	PB	PBS	Tris-HCl	Na-Acetate	PB	PBS	Tris-HCl
VHH-7D12	68.9	89.0	96.1	90.2	73.7	65.9	70.9	74.7
7D12 + Arg *	47.3	91.8	91.6	67.8	90.1	64.2	87.7	52.6
7D12 + Arg **	96.7	97.0	98.2	97.8	92.0	95.3	97.0	96.1
7D12-C5R	99.8	87.3	80.2	100.0	98.4	62.3	44.6	99.4
7D12-C9R	99.8	89.5	82.8	98.9	97.2	69.3	55.7	100.0
7D12-C5K	98.2	98.8	98.4	100.0	99.0	95.5	96.6	99.4
7D12-C9K	100.0	98.9	99.4	100.0	98.0	98.2	96.2	99.6

* 300 µM free L-arginine ** 500 mM free L-arginine.