se S4393 – Q5324 (TVLQ'AVGA)
nsp13 helicase A5325 – Q5925 (ATLQ'AENV)
nsp14 ExoN: 3′–5′ exonuclease A5926 – Q6452 (TRLQ'SLEN)
nsp15 XendoU: poly(U)-spec