In my book it talks about amino acids. It says the general structure of an amino acid is as follows:

However, on the next page it lists specific amino acids such as glycine shown here:

My question is when comparing the first image to glycine, why does glycine or any of the other specific amino acids have an extra H atom as in "H3N+"?

Where does the extra H come from and why is it positively charged?

Also, on the general structure it shows the an amino should have a COOH but on glycine it is just C double bonded to an O and then another O- negative charge.

Does this have to do with the pH and ionization?

In my book it talks about amino acids. It says the general structure of an amino acid is as follows:

However, on the next page it lists specific amino acids such as glycine shown here:

My question is when comparing the first image to glycine, why does glycine or any of the other specific amino acids have an extra H atom as in "H3N+"?

Where does the extra H come from and why is it positively charged?

Also, on the general structure it shows the an amino should have a COOH but on glycine it is just C double bonded to an O and then another O- negative charge.

Does this have to do with the pH and ionization?

Newer to chemistry. In my book it talks about amino acids. It says the general structure of an amino acid is as follows:

However, on the next page it lists specific amino acids such as glycine shown here:

My question is when comparing the first image and Glycine why does Glycine or any of the other specific amino acids have an extra H atom as in "H3N+" Where does the extra H come from and why is it positively charged? Also, on the general structure it shows the an amino should have a COOH but on Glycine it is just C double bonded to an O and then another O- negative charge. Does this have to do with the PH and ionization? Fundamental im sure, but confusing to a first semester chem student.

In my book it talks about amino acids. It says the general structure of an amino acid is as follows:

However, on the next page it lists specific amino acids such as glycine shown here:

My question is when comparing the first image to glycine, why does glycine or any of the other specific amino acids have an extra H atom as in "H3N+"?

Where does the extra H come from and why is it positively charged? 

Also, on the general structure it shows the an amino should have a COOH but on glycine it is just C double bonded to an O and then another O- negative charge. 

Does this have to do with the pH and ionization?

Newer to chemistry. In my book it talks about amino acids. It says the general structure of an amino acid is as follows:

However, on the next page it lists specific amino acids such as glycine shown here:

My question is why does Glycine or any of the other specific amino acids have an extra H atom as in "H3N+" Where does the extra H come from and why is it positively charged?

Newer to chemistry. In my book it talks about amino acids. It says the general structure of an amino acid is as follows:

However, on the next page it lists specific amino acids such as glycine shown here:

My question is when comparing the first image and Glycine why does Glycine or any of the other specific amino acids have an extra H atom as in "H3N+" Where does the extra H come from and why is it positively charged? Also, on the general structure it shows the an amino should have a COOH but on Glycine it is just C double bonded to an O and then another O- negative charge. Does this have to do with the PH and ionization? Fundamental im sure, but confusing to a first semester chem student.