Table 1.

¹³C‐Lys‐labeling of APPtg donor brains for ¹³C‐Lys APPtg brain extract generation.

Animal ID	Age (days)	13C‐Lys diet (days)	ng Aβ42/mg brain	Ratio 13C‐Lys/unlabeled Aβ17‐28	%13C‐Lys Aβ17‐28	Brain extract cohort
19290	125	75–125	11.9	1.4	57.6	1
19291	175	75–175	10.5	2.9	74.5	1
19293	175	75–175	21.7	2.4	70.2	1
19299	175	75–175	20.7	2.8	73.5	1
19300	175	75–175	20.1	2.7	72.9	1
19644	100	50–100	4.0	2.2	68.7	1
19646	100	50–100	5.2	2.5	71.8	1
19651	100	50–100	6.0	2.3	70.0	1
19696	100	50–100	5.3	2.5	71.4	1
19698	100	50–100	5.9	2.2	68.8	1
27279	175	50–175	12.6	8.8	89.8	2
27303	175	50–175	16.7	7.0	87.5	2
27324	175	50–175	18.9	7.2	87.8	2
27333	175	50–175	11.1	5.7	85.0	2
27335	175	50–175	13.1	8.0	88.9	2
27341	175	50–175	13.9	8.2	89.1	2
27380	175	50–175	13.9	8.3	89.3	2
27409	175	50–175	13.9	7.3	87.9	2
27410	175	50–175	16.1	7.0	87.5	2
35073	125	50–125	6.4	3.8	79.3	3
35074	125	50–125	6.5	4.1	80.4	3
36356	150	50–150	13.1	5.6	84.8	4
36359	150	50–150	13.3	5.4	84.3	4
36371	150	50–150	14.8	6.1	85.9	4
36373	150	50–150	10.8	5.8	85.3	4

Animal ID number, age at death, age during which ¹³C‐Lys‐labeled diet was fed, amount of Aβ42 per mg brain, ratio between ¹³C‐Lys Aβ17‐28 and unlabeled Aβ17‐28, labeling efficiency in %, cohort for ¹³C‐Lys APPtg brain extract injection.