Hi, I have a very basic question. So, I have a list of protein sequences, where each entry has a header followed by the actual sequence (all uppercase alphabet sequence) and separated from the next entry with a blank new line (as shown in the example below). Is there a way where the script reads the uppercase sequence and outputs the length of the sequence and the number of times the alphabet A occurs in that sequence? So, for the two example sequences below:


>sp|O24310|EFTU_PEA Elongation factor Tu, chloroplastic OS=Pisum sativum OX=3888 GN=TUFA PE=2 SV=1

MALSSTAATTSSKLKLSNPPSLSHTFTASASASVSNSTSFR


>sp|Q43467|EFTU1_SOYBN Elongation factor Tu, chloroplastic OS=Glycine max OX=3847 GN=TUFA PE=3 SV=1

MAVSSATASSKLILLPHASSSSSLNSTPFRSSTTNTHKLTPADSTHNIKL


I want the output to look like:


Sequence: MALSSTAATTSSKLKLSNPPSLSHTFTASASASVSNSTSFR

Length: 41

A: 6


Sequence: MAVSSATASSKLILLPHASSSSSLNSTPFRSSTTNTHKLTPADSTHNIKL

Length: 50

A: 5


Any help would be appreciated. Thank you so much.

In reply to How to count the length of a sequence of alphabets and number of occurence of a particular alphabet in the sequence? by davi54

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