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Marina contained what appears to be three closely related ''S. cerevisiae'' strains. They all showed pretty low attenuation after one week, but subsequent fermentations can be carried out longer. The flavors were described as "pretty neutral". There is a fourth yeast strain in the Marina that has yet to be identified <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/1800586383302901/?comment_id=2288654764496058&comment_tracking=%7B%22tn%22%3A%22R%22%7D Richard Preiss. Milk The Funk Facebook group thread update about Russian landrace farmhouse yeast. 09/21/2018.]</ref>.
These yeasts are listed in the [http://www.garshol.priv.no/download/farmhouse/kveik.html farmhouse registry as #39 and #40]. They are not available commercially, but they are being traded and single isolates are available from the NCYC ([https://www.ncyc.co.uk/saccharomyces-cerevisiae-4247 NCYC 4247] is Marina and [https://www.ncyc.co.uk/saccharomyces-cerevisiae-4263 NCYC 4263] is Rima).
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