pattern = '.{3}\d{3}.{1,3}.{3}\x44)';
data = re.compile(pattern, line3);
print(data)
Find all the Rows which have 'G' from the following list ...
ATOM 2462 CG LYS F 102 -2.893 40.042 54.306 1.00 40.44 C
ATOM 2463 CD LYS F 102 -2.727 39.141 55.517 1.00 54.83 C
ATOM 2464 CE LYS F 102 -1.264 38.659 55.654 1.00 66.42 C
ATOM 2465 NZ LYS F 102 -0.991 37.789 56.851 1.00 67.89 N
ATOM 2466 N ASN F 103 -4.926 39.568 51.170 1.00 38.71 N
ATOM 2467 CA ASN F 103 -6.316 39.947 50.958 1.00 50.68 C
ATOM 2468 C ASN F 103 -7.335 38.968 51.547 1.00 55.47 C
ATOM 2469 O ASN F 103 -7.221 38.707 52.774 1.00 56.08 O
ATOM 2470 CB ASN F 103 -6.597 40.317 49.482 1.00 54.91 C
ATOM 2471 CG ASN F 103 -6.420 39.160 48.523 1.00 62.17 C
ATOM 2472 OD1 ASN F 103 -7.299 38.899 47.690 1.00 66.10 O
ATOM 2473 ND2 ASN F 103 -5.273 38.493 48.590 1.00 62.60 N
ATOM 2474 OXT ASN F 103 -8.243 38.500 50.816 1.00 63.85 O
TER 2475 ASN F 103
ATOM 2476 N ALA G 1 10.194 19.797 25.657 1.00 42.95 N
ATOM 2477 CA ALA G 1 9.591 18.467 25.347 1.00 38.83 C
ATOM 2478 C ALA G 1 8.491 18.028 26.312 1.00 37.02 C
ATOM 2479 O ALA G 1 7.509 17.436 25.863 1.00 39.99 O
ATOM 2480 CB ALA G 1 10.650 17.409 25.225 1.00 44.81 C
ATOM 2481 N PRO G 2 8.653 18.254 27.645 1.00 35.04 N
ATOM 2482 CA PRO G 2 7.585 17.847 28.578 1.00 32.47 C
ATOM 2483 C PRO G 2 6.328 18.542 28.075 1.00 29.91 C
ATOM 2484 O PRO G 2 6.438 19.652 27.567 1.00 35.96 O
ATOM 2485 CB PRO G 2 8.037 18.466 29.897 1.00 30.68 C
ATOM 2486 CG PRO G 2 9.522 18.393 29.801 1.00 28.46 C
ATOM 2487 CD PRO G 2 9.794 18.834 28.388 1.00 31.97 C
ATOM 2488 N GLN G 3 5.168 17.892 28.142 1.00 29.01 N