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Author Topic:   What exactly is ID?
Coragyps
Member (Idle past 853 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 600 of 1273 (542468)
01-10-2010 8:28 AM
Reply to: Message 599 by Sky-Writing
01-10-2010 8:07 AM


Re: I found my ID in a flood
Why Sky-Writing, Sky? Doctor Pangloss would be a fine nick for you!

This message is a reply to:
 Message 599 by Sky-Writing, posted 01-10-2010 8:07 AM Sky-Writing has not replied

Coragyps
Member (Idle past 853 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 987 of 1273 (546026)
02-07-2010 2:41 PM
Reply to: Message 984 by Brad H
02-07-2010 9:20 AM


natural proteins
Here's a start:
Almost all discussions of prebiotic chemistry assume that amino acids, nucleotides, and possibly other monomers were first formed on the Earth or brought to it in comets and meteorites, and then condensed nonenzymatically to form oligomeric products. However, attempts to demonstrate plausibly prebiotic polymerization reactions have met with limited success. We show that carbonyl sulfide (COS), a simple volcanic gas, brings about the formation of peptides from amino acids under mild conditions in aqueous solution. Depending on the reaction conditions and additives used, exposure of -amino acids to COS generates peptides in yields of up to 80% in minutes to hours at room temperature.
Leman, et al., Science 306, pp 283-286, (2004). Peptides are "baby" proteins. The paper is free online at sciencemag.org if you register. And you won't get spammed.

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