ATF6-alpha is cleaved by S1P after amino acid 419 (RHLL). It is also cleaved by S2P at an unknown site. The product of cleavage is about 50 kd.
Ye, J, Rawson, RB, Komuro, R, Chen, X, Davé, UP, Prywes, R, Brown, MS, Goldstein, JL
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