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In this study, a blue pigment-producing bacteria from Lake Chungar\u00e1 (Atacama Desert, Chile) was isolated, and its blue pigment was purified and chemically characterized. The pigment-producing strain was identified as Pseudarthrobacter sp. by 16S rRNA gene sequencing. The pigment was separated from the filtered culture medium by column chromatography\/solid-phase extraction using different resins (ionic exchange, C-18, size exclusion). The strain produced up to 2.5\u00a0g\u00a0L\u22121 of blue pigment, which was very soluble in water, partially soluble in methanol and insoluble in other organic solvents. The pigment was analyzed and characterized by analytical HPLC, UV\u2013Vis, FT-IR, and H-NMR, and purified by semi-preparative HPLC. The pigment was non-toxic to brine shrimp (LD50\u2009&amp;gt;\u20092.3\u00a0g\u00a0L\u22121) and was stable at pH 6\u201310 at temperatures below 60\u00a0\u00b0C. HPLC analysis shows that the pigment is composed of four major blue fractions. The physicochemical properties and structural analysis demonstrate that this pigment belongs to the indochrome isomers, whose properties have yet to have been characterized. The high solubility in water, good stability in neutral and basic pH, and negligible toxicity of the blue pigment make it a good candidate suitable for several industrial and possibly some food applications.<\/jats:p>","DOI":"10.1007\/s10295-018-2088-3","type":"journal-article","created":{"date-parts":[[2018,10,30]],"date-time":"2018-10-30T13:16:00Z","timestamp":1540905360000},"page":"101-111","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":24,"title":["Purification and characterization of indochrome type blue pigment produced by <i>Pseudarthrobacter<\/i> sp. 34LCH1 isolated from Atacama desert"],"prefix":"10.1093","volume":"46","author":[{"given":"Sebastian","family":"Finger","sequence":"first","affiliation":[{"name":"grid.442215.4 Facultad de Medicina y Ciencia Universidad San Sebasti\u00e1n Lago Panguipulli 1390 5501842 Puerto Montt Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F\u00e9lix A","family":"Godoy","sequence":"additional","affiliation":[{"name":"grid.442234.7 Centro i-mar Universidad de Los Lagos Camino a Chinquihue s\/n km 6 Puerto Montt Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Geraldine","family":"Wittwer","sequence":"additional","affiliation":[{"name":"grid.442234.7 Centro i-mar Universidad de Los Lagos Camino a Chinquihue s\/n km 6 Puerto Montt Chile"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos P","family":"Aranda","sequence":"additional","affiliation":[{"name":"grid.442234.7 Departamento de Ciencias Biol\u00f3gicas y Biodiversidad Universidad de Los Lagos Av. 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