GalNAc is transferred onto 3a

This COVID-19 event has been created by a combination of computational inference (see https://reactome.org/documentation/inferred-events) from SARS-CoV-1 data and manual curation, as described in the summation for the overall SARS-CoV-2 infection pathway.<br><br>A sialyltransferase adds a terminal sialic acid moiety to protein 3a with an O-linked glycosyl side chain. This glycosylated form later is associated with the virion (Oostra et al, 2006)

本COVID-19事件系通过结合对SARS-CoV-1数据进行的计算推理（参见https://reactome.org/documentation/inferred-events）及人工校对而成，具体过程如SARS-CoV-2感染通路概述所述。<br><br>一种唾液酸转移酶将末端唾液酸基团添加至蛋白质3a的O连接糖苷侧链上。此糖基化形式随后与病毒颗粒（Oostra等，2006年）相结合。