Sickle cell anemia is the result of a point mutation, a change in just one nucleotide in the gene for hemoglobin. This mutation causes the hemoglobin in red blood cells to distort to a sickle shape when deoxygenated. The sickle-shaped blood cells clog in the capillaries, cutting off circulation.
Saving an attachment. Saving attachments from Mail is just as easy. Next time you receive a message to which somebody has attached a file, just tap and hold on that attachment until a Share sheet pops up. In the bottom row of icons, choose Save Attachment.aving an attachment. Saving attachments from Mail is just as easy. Next time you receive a message to which somebody has attached a file, just tap and hold on that attachment until a Share sheet pops up. In the bottom row of icons, choose Save Attachment.
1 If the email tells you to open an attachment, you should not do this. 2  This is especially so if the attachment name ends in .pif or .scr. 3  If the email is from a 'free' email account (hotmail.com, yahoo.com, etc.), and you don't know the sender, treat it with great suspicion. If the email is from a 'free' email account (hotmail.com, yahoo.com, etc.), and you don't know the sender, treat it with great suspicion. 2  If there is a link in the email, hover your cursor over it (but do not click it!).