“…The ACC-puromycin conjugate was produced as previously described [32]. The ACCA-Leu-Phe conjugate was produced according to the following references [33,34]. The ACCA-Pro-Pro and ACCA-Pro conjugates were produced as outlined in Fig EV1 and Fmoc)), 4.23 (m, 4H, HC(4 0 ) and HC(a, Pro) and OCH 2 (Fmoc)), 3.75 (s, 6H, 2xOCH 3 (DMT)), 3.70 (m, 2H, N (CH 2 CH 2 CH 2 CH 3 ) 2 ), 3.52-3.36 (m, 6H, H 2 C(5 0 ) and CH 2 (Pro) and N (CH 2 CH 2 CH 2 CH 3 ) 2 ), 2.51 and 2.36 (s, 2H, OOCH 2 CH 2 CH 2 CH 2 COO), 2.02-1.80 (m, 4H, 2xCH 2 (Pro)), 1.62 (m, 8H, OOCH 2 CH 2 CH 2 CH 2 COO and N(CH 2 CH 2 CH 2 CH 3 ) 2 ), 1.35 (m, 4H, N(CH 2 CH 2 CH 2 CH 3 ) 2 ), 0.93 (m, 6H, N(CH 2 CH 2 CH 2 CH 3 ) 2 ).…”