
Gene sequencing equipment maker Illumina's ILMN.O shares fall 2.62% to $82 premarket
China bans ILMN's gene sequencers, just minutes after U.S. President Donald Trump's additional 10% tariff took effect
Beijing had put Illumina on its "unreliable entity" list in February
Sales in China account for about 7% of the company's revenue
Stock has fallen 37% in the past 12 months