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. 2019 Sep 4;10:2052. doi: 10.3389/fmicb.2019.02052

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Copyright © 2019 Veaudor, Cassier-Chauvat and Chauvat.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Organization of the urea acquisition and catabolism genes in Nostoc PCC 7120. The genes are shown as colored boxes pointing in the direction of their transcription. Gray boxes correspond to genes not known to be involved in urea metabolism or transport. Each blue box corresponds to a genomic region. aad, acetoacetate decarboxylase; aldH, aldehyde dehydrogenase; apep, aminopeptidase; ho, hypothetical protein; cheY, chemotaxis protein CheY; tn, tranposase; srp, signal recognition particle; trx, thioredoxin.