Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.
Announcements | Published:
Bio/Technologyvolume 6, page1235 (1988) | Download Citation
Subscribe to Journal
Get full journal access for 1 year
$250.00
only $20.83 per issue
All prices are NET prices.
VAT will be added later in the checkout.
Rent or Buy article
Get time limited or full article access on ReadCube.
from$8.99
All prices are NET prices.
To obtain permission to re-use content from this article visit RightsLink.
