Igor:

You may find these links and the references therein helpful:

http://jb.asm.org/content/183/7/2298.full.pdf (p. 2299 and Ref. 31).

http://digitalassets.lib.berkeley.edu/etd/ucb/text/Shih_berkeley_0028E_13638.pdf

Best

Syed

Dear , Igor Brown 

You can find the following links :

I am so sorry , the net downloading is very poor . I shall send them later . 

With my Best regards

Dear Dr. Jafar: Thank you very much for your links. Unfortunately, non of these articles has physico-chemical data about the soil used for the isolation of PCC 7203. With kind regards. IB

Igor:

Sorry for this, but you may directly put your query to the first author of this paper cited in this link;

https://pdfs.semanticscholar.org/508c/e2f6dda96e5183d05229b1082c97e7f75848.pdf

Best

Syed

Dear , Igor Brown

Yesterday the net was poor and I am promising you for sending the attachments when the net becomes good . Now I send you the following links , they may be helpful.

http://genome.jgi.doe.gov/ChrthePCC7203_FD/ChrthePCC7203_FD.info.html

http://www.uniprot.org/taxonomy/251229

http://eol.org/pages/11666807/overview

Best regards

Dear , Igor Brown

Also you can find the links below :

Perhaps they help you  

https://www.ebi.ac.uk/biomodels-main/BMID000000142554

http://www.p2cs.org/page.php?base=Chrt2DB&PHPSESSID=fb661cbb3f85bdc48408cdf778037a5e

http://www.ecogene.org/refseq/refseq/NC_019699/searchtool///protein///all?sort=desc&order=GeneID

Good luck 

Dear Drs. Jafar and Salih: Thank you very much for your suggestions. Sincerely, IB

Can Chroococcidiopsis thermalis PCC 7203 fix N2? Is there any published papers mentioning its nitrogen fixation ability?

Thanks

Ruanbao Zhou : I guess this article will answer your question about whether 7203 is able to fix N2. IB

https://pdfs.semanticscholar.org/ed71/03e9ce44b84cd9612bdaf95bd909f7c726e2.pdf