Yeast is Sarah's lab note 2 of 6, a short audio log she records on Wizard Island. You get it automatically during the story mission I Know Things Are Strange, so it can't be missed.
Sarah plans to use the yeast Deacon brought as a carrier for viral proteins. She notes she still needs an incubator and a centrifuge, and she struggles with how to face him.
It lays out the first step of Sarah's research, which drives the Wizard Island missions.
Deacon's Alive???
Deacon's Alive??? is Sarah's lab note 1 of 6, a short audio log she records on Wizard Island. You get it automatically during the story mission A War We Can Win, so it can't be missed.
Riding With Deacon
Riding With Deacon is Sarah's lab note 4 of 6, a short audio log she records on Wizard Island. You get it automatically during the story mission Just Another Acquisition Form, so it can't be missed.
Sarah's Lab Notes
Sarah's Lab Notes are six personal research notes written by Sarah Whitaker. They are rewards for main story missions in Crater Lake, so you get them just by playing on.
Silicate
Silicate is Sarah's lab note 3 of 6, a short audio log she records on Wizard Island. You get it automatically during the story mission Afraid Of A Little Competition?, so it can't be missed.